@@ -0,0 +1,1 @@ 
+clist

@@ -0,0 +1,675 @@ 
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
+

@@ -0,0 +1,3 @@ 
+clist
+========
+

@@ -0,0 +1,8 @@ 
+module git.cyberia.club/cyberia-services/clist
+
+go 1.12
+
+require (
+	github.com/mattn/go-sqlite3 v1.10.0
+	gopkg.in/ini.v1 v1.42.0
+)

@@ -0,0 +1,4 @@ 
+github.com/mattn/go-sqlite3 v1.10.0 h1:jbhqpg7tQe4SupckyijYiy0mJJ/pRyHvXf7JdWK860o=
+github.com/mattn/go-sqlite3 v1.10.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
+gopkg.in/ini.v1 v1.42.0 h1:7N3gPTt50s8GuLortA00n8AqRTk75qOP98+mTPpgzRk=
+gopkg.in/ini.v1 v1.42.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=

@@ -0,0 +1,625 @@ 
+// Package email is designed to provide an "email interface for humans."
+// Designed to be robust and flexible, the email package aims to make sending email easy without getting in the way.
+package email
+
+import (
+	"bufio"
+	"bytes"
+	"crypto/rand"
+	"crypto/tls"
+	"encoding/base64"
+	"errors"
+	"fmt"
+	"io"
+	"math"
+	"math/big"
+	"mime"
+	"mime/multipart"
+	"mime/quotedprintable"
+	"net/mail"
+	"net/smtp"
+	"net/textproto"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+	"unicode"
+)
+
+const (
+	MaxLineLength      = 76                             // MaxLineLength is the maximum line length per RFC 2045
+	defaultContentType = "text/plain; charset=us-ascii" // defaultContentType is the default Content-Type according to RFC 2045, section 5.2
+)
+
+// ErrMissingBoundary is returned when there is no boundary given for a multipart entity
+var ErrMissingBoundary = errors.New("No boundary found for multipart entity")
+
+// ErrMissingContentType is returned when there is no "Content-Type" header for a MIME entity
+var ErrMissingContentType = errors.New("No Content-Type found for MIME entity")
+
+// Email is the type used for email messages
+type Email struct {
+	ReplyTo     []string
+	From        string
+	To          []string
+	Recipients  []string
+	Bcc         []string
+	Cc          []string
+	Subject     string
+	Text        []byte // Plaintext message (optional)
+	HTML        []byte // Html message (optional)
+	Sender      string // override From as SMTP envelope sender (optional)
+	Headers     textproto.MIMEHeader
+	Attachments []*Attachment
+	ReadReceipt []string
+}
+
+// part is a copyable representation of a multipart.Part
+type part struct {
+	header textproto.MIMEHeader
+	body   []byte
+}
+
+// NewEmail creates an Email, and returns the pointer to it.
+func NewEmail() *Email {
+	return &Email{Headers: textproto.MIMEHeader{}}
+}
+
+// trimReader is a custom io.Reader that will trim any leading
+// whitespace, as this can cause email imports to fail.
+type trimReader struct {
+	rd io.Reader
+}
+
+// Read trims off any unicode whitespace from the originating reader
+func (tr trimReader) Read(buf []byte) (int, error) {
+	n, err := tr.rd.Read(buf)
+	t := bytes.TrimLeftFunc(buf[:n], unicode.IsSpace)
+	n = copy(buf, t)
+	return n, err
+}
+
+// NewEmailFromReader reads a stream of bytes from an io.Reader, r,
+// and returns an email struct containing the parsed data.
+// This function expects the data in RFC 5322 format.
+func NewEmailFromReader(r io.Reader) (*Email, error) {
+	e := NewEmail()
+	s := trimReader{rd: r}
+	tp := textproto.NewReader(bufio.NewReader(s))
+	// Parse the main headers
+	hdrs, err := tp.ReadMIMEHeader()
+	if err != nil {
+		return e, err
+	}
+	// Set the subject, to, cc, bcc, and from
+	for h, v := range hdrs {
+		switch {
+		case h == "Subject":
+			e.Subject = v[0]
+			subj, err := (&mime.WordDecoder{}).DecodeHeader(e.Subject)
+			if err == nil && len(subj) > 0 {
+				e.Subject = subj
+			}
+			delete(hdrs, h)
+		case h == "To":
+			for _, to := range v {
+				tt, err := (&mime.WordDecoder{}).DecodeHeader(to)
+				if err == nil {
+					e.To = append(e.To, tt)
+				} else {
+					e.To = append(e.To, to)
+				}
+			}
+			delete(hdrs, h)
+		case h == "Cc":
+			for _, cc := range v {
+				tcc, err := (&mime.WordDecoder{}).DecodeHeader(cc)
+				if err == nil {
+					e.Cc = append(e.Cc, tcc)
+				} else {
+					e.Cc = append(e.Cc, cc)
+				}
+			}
+			delete(hdrs, h)
+		case h == "Bcc":
+			for _, bcc := range v {
+				tbcc, err := (&mime.WordDecoder{}).DecodeHeader(bcc)
+				if err == nil {
+					e.Bcc = append(e.Bcc, tbcc)
+				} else {
+					e.Bcc = append(e.Bcc, bcc)
+				}
+			}
+			delete(hdrs, h)
+		case h == "From":
+			e.From = v[0]
+			fr, err := (&mime.WordDecoder{}).DecodeHeader(e.From)
+			if err == nil && len(fr) > 0 {
+				e.From = fr
+			}
+			delete(hdrs, h)
+		}
+	}
+	e.Headers = hdrs
+	body := tp.R
+	// Recursively parse the MIME parts
+	ps, err := parseMIMEParts(e.Headers, body)
+	if err != nil {
+		return e, err
+	}
+	for _, p := range ps {
+		if ct := p.header.Get("Content-Type"); ct == "" {
+			return e, ErrMissingContentType
+		}
+		ct, _, err := mime.ParseMediaType(p.header.Get("Content-Type"))
+		if err != nil {
+			return e, err
+		}
+		switch {
+		case ct == "text/plain":
+			e.Text = p.body
+		case ct == "text/html":
+			e.HTML = p.body
+		}
+	}
+	return e, nil
+}
+
+// parseMIMEParts will recursively walk a MIME entity and return a []mime.Part containing
+// each (flattened) mime.Part found.
+// It is important to note that there are no limits to the number of recursions, so be
+// careful when parsing unknown MIME structures!
+func parseMIMEParts(hs textproto.MIMEHeader, b io.Reader) ([]*part, error) {
+	var ps []*part
+	// If no content type is given, set it to the default
+	if _, ok := hs["Content-Type"]; !ok {
+		hs.Set("Content-Type", defaultContentType)
+	}
+	ct, params, err := mime.ParseMediaType(hs.Get("Content-Type"))
+	if err != nil {
+		return ps, err
+	}
+	// If it's a multipart email, recursively parse the parts
+	if strings.HasPrefix(ct, "multipart/") {
+		if _, ok := params["boundary"]; !ok {
+			return ps, ErrMissingBoundary
+		}
+		mr := multipart.NewReader(b, params["boundary"])
+		for {
+			var buf bytes.Buffer
+			p, err := mr.NextPart()
+			if err == io.EOF {
+				break
+			}
+			if err != nil {
+				return ps, err
+			}
+			if _, ok := p.Header["Content-Type"]; !ok {
+				p.Header.Set("Content-Type", defaultContentType)
+			}
+			subct, _, err := mime.ParseMediaType(p.Header.Get("Content-Type"))
+			if err != nil {
+				return ps, err
+			}
+			if strings.HasPrefix(subct, "multipart/") {
+				sps, err := parseMIMEParts(p.Header, p)
+				if err != nil {
+					return ps, err
+				}
+				ps = append(ps, sps...)
+			} else {
+				var reader io.Reader
+				reader = p
+				const cte = "Content-Transfer-Encoding"
+				if p.Header.Get(cte) == "base64" {
+					reader = base64.NewDecoder(base64.StdEncoding, reader)
+				}
+				// Otherwise, just append the part to the list
+				// Copy the part data into the buffer
+				if _, err := io.Copy(&buf, reader); err != nil {
+					return ps, err
+				}
+				ps = append(ps, &part{body: buf.Bytes(), header: p.Header})
+			}
+		}
+	} else {
+		// If it is not a multipart email, parse the body content as a single "part"
+		var buf bytes.Buffer
+		if _, err := io.Copy(&buf, b); err != nil {
+			return ps, err
+		}
+		ps = append(ps, &part{body: buf.Bytes(), header: hs})
+	}
+	return ps, nil
+}
+
+// Attach is used to attach content from an io.Reader to the email.
+// Required parameters include an io.Reader, the desired filename for the attachment, and the Content-Type
+// The function will return the created Attachment for reference, as well as nil for the error, if successful.
+func (e *Email) Attach(r io.Reader, filename string, c string) (a *Attachment, err error) {
+	var buffer bytes.Buffer
+	if _, err = io.Copy(&buffer, r); err != nil {
+		return
+	}
+	at := &Attachment{
+		Filename: filename,
+		Header:   textproto.MIMEHeader{},
+		Content:  buffer.Bytes(),
+	}
+	// Get the Content-Type to be used in the MIMEHeader
+	if c != "" {
+		at.Header.Set("Content-Type", c)
+	} else {
+		// If the Content-Type is blank, set the Content-Type to "application/octet-stream"
+		at.Header.Set("Content-Type", "application/octet-stream")
+	}
+	at.Header.Set("Content-Disposition", fmt.Sprintf("attachment;\r\n filename=\"%s\"", filename))
+	at.Header.Set("Content-ID", fmt.Sprintf("<%s>", filename))
+	at.Header.Set("Content-Transfer-Encoding", "base64")
+	e.Attachments = append(e.Attachments, at)
+	return at, nil
+}
+
+// AttachFile is used to attach content to the email.
+// It attempts to open the file referenced by filename and, if successful, creates an Attachment.
+// This Attachment is then appended to the slice of Email.Attachments.
+// The function will then return the Attachment for reference, as well as nil for the error, if successful.
+func (e *Email) AttachFile(filename string) (a *Attachment, err error) {
+	f, err := os.Open(filename)
+	if err != nil {
+		return
+	}
+	defer f.Close()
+
+	ct := mime.TypeByExtension(filepath.Ext(filename))
+	basename := filepath.Base(filename)
+	return e.Attach(f, basename, ct)
+}
+
+// msgHeaders merges the Email's various fields and custom headers together in a
+// standards compliant way to create a MIMEHeader to be used in the resulting
+// message. It does not alter e.Headers.
+//
+// "e"'s fields To, Cc, From, Subject will be used unless they are present in
+// e.Headers. Unless set in e.Headers, "Date" will filled with the current time.
+func (e *Email) msgHeaders() (textproto.MIMEHeader, error) {
+	res := make(textproto.MIMEHeader, len(e.Headers)+4)
+	if e.Headers != nil {
+		for _, h := range []string{"Reply-To", "To", "Cc", "From", "Subject", "Date", "Message-Id", "MIME-Version"} {
+			if v, ok := e.Headers[h]; ok {
+				res[h] = v
+			}
+		}
+	}
+	// Set headers if there are values.
+	if _, ok := res["Reply-To"]; !ok && len(e.ReplyTo) > 0 {
+		res.Set("Reply-To", strings.Join(e.ReplyTo, ", "))
+	}
+	if _, ok := res["To"]; !ok && len(e.To) > 0 {
+		res.Set("To", strings.Join(e.To, ", "))
+	}
+	if _, ok := res["Cc"]; !ok && len(e.Cc) > 0 {
+		res.Set("Cc", strings.Join(e.Cc, ", "))
+	}
+	if _, ok := res["Subject"]; !ok && e.Subject != "" {
+		res.Set("Subject", e.Subject)
+	}
+	if _, ok := res["Message-Id"]; !ok {
+		id, err := generateMessageID()
+		if err != nil {
+			return nil, err
+		}
+		res.Set("Message-Id", id)
+	}
+	// Date and From are required headers.
+	if _, ok := res["From"]; !ok {
+		res.Set("From", e.From)
+	}
+	if _, ok := res["Date"]; !ok {
+		res.Set("Date", time.Now().Format(time.RFC1123Z))
+	}
+	if _, ok := res["MIME-Version"]; !ok {
+		res.Set("MIME-Version", "1.0")
+	}
+	for field, vals := range e.Headers {
+		if _, ok := res[field]; !ok {
+			res[field] = vals
+		}
+	}
+	return res, nil
+}
+
+func writeMessage(buff io.Writer, msg []byte, multipart bool, mediaType string, w *multipart.Writer) error {
+	if multipart {
+		header := textproto.MIMEHeader{
+			"Content-Type":              {mediaType + "; charset=UTF-8"},
+			"Content-Transfer-Encoding": {"quoted-printable"},
+		}
+		if _, err := w.CreatePart(header); err != nil {
+			return err
+		}
+	}
+
+	qp := quotedprintable.NewWriter(buff)
+	// Write the text
+	if _, err := qp.Write(msg); err != nil {
+		return err
+	}
+	return qp.Close()
+}
+
+// Bytes converts the Email object to a []byte representation, including all needed MIMEHeaders, boundaries, etc.
+func (e *Email) Bytes() ([]byte, error) {
+	// TODO: better guess buffer size
+	buff := bytes.NewBuffer(make([]byte, 0, 4096))
+
+	headers, err := e.msgHeaders()
+	if err != nil {
+		return nil, err
+	}
+
+	var (
+		isMixed       = len(e.Attachments) > 0
+		isAlternative = len(e.Text) > 0 && len(e.HTML) > 0
+	)
+
+	var w *multipart.Writer
+	if isMixed || isAlternative {
+		w = multipart.NewWriter(buff)
+	}
+	switch {
+	case isMixed:
+		headers.Set("Content-Type", "multipart/mixed;\r\n boundary="+w.Boundary())
+	case isAlternative:
+		headers.Set("Content-Type", "multipart/alternative;\r\n boundary="+w.Boundary())
+	case len(e.HTML) > 0:
+		headers.Set("Content-Type", "text/html; charset=UTF-8")
+		headers.Set("Content-Transfer-Encoding", "quoted-printable")
+	default:
+		headers.Set("Content-Type", "text/plain; charset=UTF-8")
+		headers.Set("Content-Transfer-Encoding", "quoted-printable")
+	}
+	headerToBytes(buff, headers)
+	_, err = io.WriteString(buff, "\r\n")
+	if err != nil {
+		return nil, err
+	}
+
+	// Check to see if there is a Text or HTML field
+	if len(e.Text) > 0 || len(e.HTML) > 0 {
+		var subWriter *multipart.Writer
+
+		if isMixed && isAlternative {
+			// Create the multipart alternative part
+			subWriter = multipart.NewWriter(buff)
+			header := textproto.MIMEHeader{
+				"Content-Type": {"multipart/alternative;\r\n boundary=" + subWriter.Boundary()},
+			}
+			if _, err := w.CreatePart(header); err != nil {
+				return nil, err
+			}
+		} else {
+			subWriter = w
+		}
+		// Create the body sections
+		if len(e.Text) > 0 {
+			// Write the text
+			if err := writeMessage(buff, e.Text, isMixed || isAlternative, "text/plain", subWriter); err != nil {
+				return nil, err
+			}
+		}
+		if len(e.HTML) > 0 {
+			// Write the HTML
+			if err := writeMessage(buff, e.HTML, isMixed || isAlternative, "text/html", subWriter); err != nil {
+				return nil, err
+			}
+		}
+		if isMixed && isAlternative {
+			if err := subWriter.Close(); err != nil {
+				return nil, err
+			}
+		}
+	}
+	// Create attachment part, if necessary
+	for _, a := range e.Attachments {
+		ap, err := w.CreatePart(a.Header)
+		if err != nil {
+			return nil, err
+		}
+		// Write the base64Wrapped content to the part
+		base64Wrap(ap, a.Content)
+	}
+	if isMixed || isAlternative {
+		if err := w.Close(); err != nil {
+			return nil, err
+		}
+	}
+	return buff.Bytes(), nil
+}
+
+// Send an email using the given host and SMTP auth (optional), returns any error thrown by smtp.SendMail
+// This function merges the To, Cc, and Bcc fields and calls the smtp.SendMail function using the Email.Bytes() output as the message
+func (e *Email) Send(addr string, a smtp.Auth) error {
+	// Check to make sure there is at least one recipient and one "From" address
+	sender, err := e.parseSender()
+	if err != nil {
+		return err
+	}
+	raw, err := e.Bytes()
+	if err != nil {
+		return err
+	}
+	return smtp.SendMail(addr, a, sender, e.Recipients, raw)
+}
+
+// Select and parse an SMTP envelope sender address.  Choose Email.Sender if set, or fallback to Email.From.
+func (e *Email) parseSender() (string, error) {
+	if e.Sender != "" {
+		sender, err := mail.ParseAddress(e.Sender)
+		if err != nil {
+			return "", err
+		}
+		return sender.Address, nil
+	} else {
+		from, err := mail.ParseAddress(e.From)
+		if err != nil {
+			return "", err
+		}
+		return from.Address, nil
+	}
+}
+
+// SendWithTLS sends an email with an optional TLS config.
+// This is helpful if you need to connect to a host that is used an untrusted
+// certificate.
+func (e *Email) SendWithTLS(addr string, a smtp.Auth, t *tls.Config) error {
+	// Merge the To, Cc, and Bcc fields
+	to := make([]string, 0, len(e.To)+len(e.Cc)+len(e.Bcc))
+	to = append(append(append(to, e.To...), e.Cc...), e.Bcc...)
+	for i := 0; i < len(to); i++ {
+		addr, err := mail.ParseAddress(to[i])
+		if err != nil {
+			return err
+		}
+		to[i] = addr.Address
+	}
+	// Check to make sure there is at least one recipient and one "From" address
+	if e.From == "" || len(to) == 0 {
+		return errors.New("Must specify at least one From address and one To address")
+	}
+	sender, err := e.parseSender()
+	if err != nil {
+		return err
+	}
+	raw, err := e.Bytes()
+	if err != nil {
+		return err
+	}
+
+	conn, err := tls.Dial("tcp", addr, t)
+	if err != nil {
+		return err
+	}
+
+	c, err := smtp.NewClient(conn, t.ServerName)
+	if err != nil {
+		return err
+	}
+	defer c.Close()
+	if err = c.Hello("localhost"); err != nil {
+		return err
+	}
+	// Use TLS if available
+	if ok, _ := c.Extension("STARTTLS"); ok {
+		if err = c.StartTLS(t); err != nil {
+			return err
+		}
+	}
+
+	if a != nil {
+		if ok, _ := c.Extension("AUTH"); ok {
+			if err = c.Auth(a); err != nil {
+				return err
+			}
+		}
+	}
+	if err = c.Mail(sender); err != nil {
+		return err
+	}
+	for _, addr := range to {
+		if err = c.Rcpt(addr); err != nil {
+			return err
+		}
+	}
+	w, err := c.Data()
+	if err != nil {
+		return err
+	}
+	_, err = w.Write(raw)
+	if err != nil {
+		return err
+	}
+	err = w.Close()
+	if err != nil {
+		return err
+	}
+	return c.Quit()
+}
+
+// Attachment is a struct representing an email attachment.
+// Based on the mime/multipart.FileHeader struct, Attachment contains the name, MIMEHeader, and content of the attachment in question
+type Attachment struct {
+	Filename string
+	Header   textproto.MIMEHeader
+	Content  []byte
+}
+
+// base64Wrap encodes the attachment content, and wraps it according to RFC 2045 standards (every 76 chars)
+// The output is then written to the specified io.Writer
+func base64Wrap(w io.Writer, b []byte) {
+	// 57 raw bytes per 76-byte base64 line.
+	const maxRaw = 57
+	// Buffer for each line, including trailing CRLF.
+	buffer := make([]byte, MaxLineLength+len("\r\n"))
+	copy(buffer[MaxLineLength:], "\r\n")
+	// Process raw chunks until there's no longer enough to fill a line.
+	for len(b) >= maxRaw {
+		base64.StdEncoding.Encode(buffer, b[:maxRaw])
+		w.Write(buffer)
+		b = b[maxRaw:]
+	}
+	// Handle the last chunk of bytes.
+	if len(b) > 0 {
+		out := buffer[:base64.StdEncoding.EncodedLen(len(b))]
+		base64.StdEncoding.Encode(out, b)
+		out = append(out, "\r\n"...)
+		w.Write(out)
+	}
+}
+
+// headerToBytes renders "header" to "buff". If there are multiple values for a
+// field, multiple "Field: value\r\n" lines will be emitted.
+func headerToBytes(buff io.Writer, header textproto.MIMEHeader) {
+	for field, vals := range header {
+		for _, subval := range vals {
+			// bytes.Buffer.Write() never returns an error.
+			io.WriteString(buff, field)
+			io.WriteString(buff, ": ")
+			// Write the encoded header if needed
+			switch {
+			case field == "Content-Type" || field == "Content-Disposition":
+				buff.Write([]byte(subval))
+			default:
+				buff.Write([]byte(mime.QEncoding.Encode("UTF-8", subval)))
+			}
+			io.WriteString(buff, "\r\n")
+		}
+	}
+}
+
+var maxBigInt = big.NewInt(math.MaxInt64)
+
+// generateMessageID generates and returns a string suitable for an RFC 2822
+// compliant Message-ID, e.g.:
+// <1444789264909237300.3464.1819418242800517193@DESKTOP01>
+//
+// The following parameters are used to generate a Message-ID:
+// - The nanoseconds since Epoch
+// - The calling PID
+// - A cryptographically random int64
+// - The sending hostname
+func generateMessageID() (string, error) {
+	t := time.Now().UnixNano()
+	pid := os.Getpid()
+	rint, err := rand.Int(rand.Reader, maxBigInt)
+	if err != nil {
+		return "", err
+	}
+	h, err := os.Hostname()
+	// If we can't get the hostname, we'll use localhost
+	if err != nil {
+		h = "localhost.localdomain"
+	}
+	msgid := fmt.Sprintf("<%d.%d.%d@%s>", t, pid, rint, h)
+	return msgid, nil
+}

@@ -0,0 +1,560 @@ 
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"database/sql"
+	"flag"
+	"fmt"
+	"git.cyberia.club/cyberia-services/clist/mail"
+	_ "github.com/mattn/go-sqlite3"
+	"gopkg.in/ini.v1"
+	"io"
+	"log"
+	"net/mail"
+	"net/smtp"
+	"os"
+	"strings"
+	"time"
+)
+
+type Config struct {
+	CommandAddress string `ini:"command_address"`
+	Log            string `ini:"log"`
+	Database       string `ini:"database"`
+	SMTPHostname   string `ini:"smtp_hostname"`
+	SMTPPort       string `ini:"smtp_port"`
+	SMTPUsername   string `ini:"smtp_username"`
+	SMTPPassword   string `ini:"smtp_password"`
+	Lists          map[string]*List
+	Debug          bool
+	ConfigFile     string
+}
+
+type List struct {
+	Name            string `ini:"name"`
+	Archive         string `ini:"archive"`
+	Owner           string `ini:"owner"`
+	Description     string `ini:"description"`
+	Id              string
+	Address         string   `ini:"address"`
+	Hidden          bool     `ini:"hidden"`
+	SubscribersOnly bool     `ini:"subscribers_only"`
+	Posters         []string `ini:"posters,omitempty"`
+	Bcc             []string `ini:"bcc,omitempty"`
+}
+
+var gConfig *Config
+
+// Entry point
+func main() {
+	gConfig = &Config{}
+
+	flag.StringVar(&gConfig.ConfigFile, "config", "", "Load configuration from specified file")
+	flag.Parse()
+
+	loadConfig()
+
+	if len(flag.Args()) < 1 {
+		fmt.Printf("Error: Command not specified\n")
+		os.Exit(1)
+	}
+
+	requireLog()
+
+	if flag.Arg(0) == "message" {
+		msg := email.NewEmail()
+		msg, err := email.NewEmailFromReader(bufio.NewReader(os.Stdin))
+		if err != nil {
+			log.Printf("ERROR_PARSING_MESSAGE Error=%q\n", err.Error())
+			os.Exit(0)
+		}
+		log.Printf("MESSAGE_RECEIVED From=%q To=%q Cc=%q Bcc=%q Subject=%q\n",
+			msg.From, msg.To, msg.Cc, msg.Bcc, msg.Subject)
+		handleMessage(msg)
+	} else {
+		fmt.Printf("Unknown command %s\n", flag.Arg(0))
+	}
+}
+
+func checkAddress(addrs []string, checkAddr string) bool {
+	for _, to := range addrs {
+		t, _ := mail.ParseAddress(to)
+		if t.Address == checkAddr {
+			return true
+		}
+	}
+	return false
+}
+
+// Figure out if this is a command, or a mailing list post
+func handleMessage(msg *email.Email) {
+	if checkAddress(msg.To, gConfig.CommandAddress) {
+		handleCommand(msg)
+	} else {
+		matchedLists := []*List{}
+		for _, l := range gConfig.Lists {
+			agg := append(msg.To, msg.Cc...)
+			if checkAddress(agg, l.Address) {
+				matchedLists = append(matchedLists, l)
+			}
+		}
+
+		log.Printf("matchedLists: %q", matchedLists)
+		if len(matchedLists) == 1 {
+			list := matchedLists[0]
+			if list.CanPost(msg.From) {
+				msg := buildListEmail(msg, list)
+				send(msg)
+				log.Printf("MESSAGE_SENT ListId=%q",
+					list.Id)
+			} else {
+				handleNotAuthorisedToPost(msg)
+			}
+		} else {
+			log.Printf("LISTS: %q", msg)
+			handleNoDestination(msg)
+		}
+	}
+}
+
+// Handle the command given by the user
+func handleCommand(msg *email.Email) {
+	if msg.Subject == "lists" {
+		handleShowLists(msg)
+	} else if msg.Subject == "help" {
+		handleHelp(msg)
+	} else if strings.HasPrefix(msg.Subject, "subscribe") {
+		handleSubscribe(msg)
+	} else if strings.HasPrefix(msg.Subject, "unsubscribe") {
+		handleUnsubscribe(msg)
+	} else {
+		handleUnknownCommand(msg)
+	}
+}
+
+// Reply to a message that has nowhere to go
+func handleNoDestination(msg *email.Email) {
+	reply := reply(msg)
+	reply.From = gConfig.CommandAddress
+	reply.Text = []byte("No mailing lists addressed. Your message has not been delivered.\r\n")
+	send(reply)
+	log.Printf("UNKNOWN_DESTINATION From=%q To=%q Cc=%q Bcc=%q", msg.From, msg.To, msg.Cc, msg.Bcc)
+}
+
+// Reply that the user isn't authorised to post to the list
+func handleNotAuthorisedToPost(msg *email.Email) {
+	reply := reply(msg)
+	reply.From = gConfig.CommandAddress
+	reply.Text = []byte("You are not an approved poster for this mailing list. Your message has not been delivered.\r\n")
+	send(reply)
+	log.Printf("UNAUTHORISED_POST From=%q To=%q Cc=%q Bcc=%q", msg.From, msg.To, msg.Cc, msg.Bcc)
+}
+
+// Reply to an unknown command, giving some help
+func handleUnknownCommand(msg *email.Email) {
+	reply := reply(msg)
+	reply.From = gConfig.CommandAddress
+	reply.Text = []byte(fmt.Sprintf(
+		"%s is not a valid command.\r\n\r\n"+
+			"Valid commands are:\r\n\r\n"+
+			commandInfo(),
+		msg.Subject))
+	send(reply)
+	log.Printf("UNKNOWN_COMMAND From=%q", msg.From)
+}
+
+// Reply to a help command with help information
+func handleHelp(msg *email.Email) {
+	var body bytes.Buffer
+	fmt.Fprintf(&body, commandInfo())
+	reply := reply(msg)
+	reply.From = gConfig.CommandAddress
+	reply.Text = []byte(body.String())
+	send(reply)
+	log.Printf("HELP_SENT To=%q", reply.To)
+}
+
+// Reply to a show mailing lists command with a list of mailing lists
+func handleShowLists(msg *email.Email) {
+	log.Printf("HANDLEHSOWLISTS")
+	var body bytes.Buffer
+	fmt.Fprintf(&body, "Available mailing lists\r\n")
+	fmt.Fprintf(&body, "-----------------------\r\n\r\n")
+	for _, list := range gConfig.Lists {
+		if !list.Hidden {
+			fmt.Fprintf(&body,
+				"%s\r\n============\r\n"+
+					"%s\r\n\r\n",
+				list.Id, list.Description)
+		}
+	}
+
+	log.Printf("SEND")
+	fmt.Fprintf(&body,
+		"\r\nTo subscribe to a mailing list, email %s with 'subscribe <list-id>' as the subject.\r\n",
+		gConfig.CommandAddress)
+
+	log.Printf("SEND")
+	reply := reply(msg)
+	log.Printf("SEND")
+	reply.From = gConfig.CommandAddress
+	log.Printf("SEND")
+	reply.Text = []byte(body.String())
+	log.Printf("SEND")
+	send(reply)
+	log.Printf("LIST_SENT To=%q", reply.To)
+}
+
+// Handle a subscribe command
+func handleSubscribe(msg *email.Email) {
+	listId := strings.TrimPrefix(msg.Subject, "subscribe ")
+	list := List{}
+
+	// Switch to id - in case we were passed address
+	listId = list.Id
+
+	if isSubscribed(msg.From, listId) {
+		reply := reply(msg)
+		reply.From = gConfig.CommandAddress
+		reply.Text = []byte(fmt.Sprintf("You are already subscribed to %s\r\n", listId))
+		send(reply)
+		log.Printf("DUPLICATE_SUBSCRIPTION_REQUEST User=%q List=%q\n", msg.From, listId)
+		os.Exit(0)
+	}
+
+	addSubscription(msg.From, listId)
+	reply := reply(msg)
+	reply.Text = []byte(fmt.Sprintf("You are now subscribed to %s\r\n", listId))
+	send(reply)
+}
+
+// Handle an unsubscribe command
+func handleUnsubscribe(msg *email.Email) {
+	listId := strings.TrimPrefix(msg.Subject, "unsubscribe ")
+	list := List{} //lookupList(listId)
+
+	// Switch to id - in case we were passed address
+	listId = list.Id
+
+	if !isSubscribed(msg.From, listId) {
+		reply := reply(msg)
+		reply.Text = []byte(fmt.Sprintf("You aren't subscribed to %s\r\n", listId))
+		send(reply)
+		log.Printf("DUPLICATE_UNSUBSCRIPTION_REQUEST User=%q List=%q\n", msg.From, listId)
+		os.Exit(0)
+	}
+
+	removeSubscription(msg.From, listId)
+	reply := reply(msg)
+	reply.Text = []byte(fmt.Sprintf("You are now unsubscribed from %s\r\n", listId))
+	send(reply)
+}
+
+// Create a new message that replies to this message
+func reply(msg *email.Email) *email.Email {
+	reply := email.NewEmail()
+	reply.Subject = "Re: " + msg.Subject
+	reply.From = msg.To[0]
+	reply.To = []string{msg.From}
+	reply.Headers["Date"] = []string{time.Now().Format("Mon, 2 Jan 2006 15:04:05 -0700")}
+	return reply
+}
+
+func badAddress(a string, list []string) bool {
+	for _, l := range list {
+		if l == a {
+			return true
+		}
+	}
+	return false
+}
+
+func buildListEmail(e *email.Email, l *List) *email.Email {
+	addresses := []string{}
+	m, _ := mail.ParseAddress(e.From)
+	addresses = append(addresses, m.Address)
+	for _, list := range gConfig.Lists {
+		addresses = append(addresses, list.Address)
+	}
+
+	cc := []string{}
+	recipients := []string{}
+
+	for _, a := range e.Cc {
+		if !badAddress(a, addresses) {
+			cc = append(cc, a)
+		}
+	}
+
+	for _, a := range fetchSubscribers(l.Id) {
+		if !badAddress(a, addresses) {
+			recipients = append(recipients, a)
+		}
+	}
+
+	// Copy the message
+	// Add headers
+	// Return the new message
+	newEmail := email.NewEmail()
+	newEmail.Sender = l.Address
+	newEmail.From = getNameOrAddress(e.From) + "<" + l.Address + ">"
+	newEmail.To = []string{l.Name + "<" + l.Address + ">"}
+	newEmail.Cc = cc
+	newEmail.Recipients = recipients
+	newEmail.Subject = e.Subject
+	newEmail.Text = e.Text
+	newEmail.Headers["Date"] = e.Headers["Date"]
+	newEmail.Headers["Reply-To"] = []string{e.From}
+	newEmail.Headers["Precedence"] = []string{"list"}
+	newEmail.Headers["List-Id"] = []string{"<" + l.Id + ">"}
+	newEmail.Headers["List-Post"] = []string{"<mailto:" + l.Address + ">"}
+	newEmail.Headers["List-Help"] = []string{"<mailto:" + l.Address + "?subject=help>"}
+	newEmail.Headers["List-Subscribe"] = []string{"<mailto:" + gConfig.CommandAddress + "?subject=subscribe>"}
+	newEmail.Headers["List-Unsubscribe"] = []string{"<mailto:" + gConfig.CommandAddress + "?subject=unsubscribe>"}
+	newEmail.Headers["List-Archive"] = []string{"<" + l.Archive + ">"}
+	newEmail.Headers["List-Owner"] = []string{"<" + l.Owner + ">"}
+	return newEmail
+}
+
+func getNameOrAddress(a string) string {
+	r, err := mail.ParseAddress(a)
+	if err != nil {
+		log.Printf("couldn't parse from address")
+		return ""
+	}
+	if r.Name != "" {
+		return r.Name
+	}
+	return r.Address
+}
+
+func send(e *email.Email) {
+	log.Printf("MESSAGE:\n")
+	log.Printf("%q\n", e)
+	e.Send("mail.c3f.net:587", smtp.PlainAuth("", gConfig.SMTPUsername, gConfig.SMTPPassword, "mail.c3f.net"))
+	//for _, r := range recipients {
+	//	sender, _ := mail.ParseAddress(msg.From)
+	//	if sender.Address != r {
+	//		msg.Bcc = append(msg.Bcc, r)
+	//	}
+	//	}
+}
+
+// MAILING LIST LOGIC /////////////////////////////////////////////////////////
+
+// Check if the user is authorised to post to this mailing list
+func (list *List) CanPost(from string) bool {
+
+	// Is this list restricted to subscribers only?
+	if list.SubscribersOnly && !isSubscribed(from, list.Id) {
+		return false
+	}
+
+	// Is there a whitelist of approved posters?
+	if len(list.Posters) > 0 {
+		for _, poster := range list.Posters {
+			if from == poster {
+				return true
+			}
+		}
+		return false
+	}
+
+	return true
+}
+
+// DATABASE LOGIC /////////////////////////////////////////////////////////////
+
+// Open the database
+func openDB() (*sql.DB, error) {
+	db, err := sql.Open("sqlite3", gConfig.Database)
+
+	if err != nil {
+		return nil, err
+	}
+
+	_, err = db.Exec(`
+	CREATE TABLE IF NOT EXISTS "subscriptions" (
+		"list" TEXT,
+		"user" TEXT
+	);
+	`)
+
+	return db, err
+}
+
+// Open the database or fail immediately
+func requireDB() *sql.DB {
+	db, err := openDB()
+	if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(1)
+	}
+	return db
+}
+
+// Fetch list of subscribers to a mailing list from database
+func fetchSubscribers(listId string) []string {
+	db := requireDB()
+	rows, err := db.Query("SELECT user FROM subscriptions WHERE list=?", listId)
+
+	if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+
+	listIds := []string{}
+	defer rows.Close()
+	for rows.Next() {
+		var user string
+		rows.Scan(&user)
+		listIds = append(listIds, user)
+	}
+
+	return listIds
+}
+
+// Check if a user is subscribed to a mailing list
+func isSubscribed(user string, list string) bool {
+	addressObj, err := mail.ParseAddress(user)
+	if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+	db := requireDB()
+
+	exists := false
+	err = db.QueryRow("SELECT 1 FROM subscriptions WHERE user=? AND list=?", addressObj.Address, list).Scan(&exists)
+
+	if err == sql.ErrNoRows {
+		return false
+	} else if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+
+	return true
+}
+
+// Add a subscription to the subscription database
+func addSubscription(user string, list string) {
+	addressObj, err := mail.ParseAddress(user)
+	if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+
+	db := requireDB()
+	_, err = db.Exec("INSERT INTO subscriptions (user,list) VALUES(?,?)", addressObj.Address, list)
+	if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+	log.Printf("SUBSCRIPTION_ADDED User=%q List=%q\n", user, list)
+}
+
+// Remove a subscription from the subscription database
+func removeSubscription(user string, list string) {
+	addressObj, err := mail.ParseAddress(user)
+	if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+
+	db := requireDB()
+	_, err = db.Exec("DELETE FROM subscriptions WHERE user=? AND list=?", addressObj.Address, list)
+	if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+	log.Printf("SUBSCRIPTION_REMOVED User=%q List=%q\n", user, list)
+}
+
+// Remove all subscriptions from a given mailing list
+func clearSubscriptions(list string) {
+	db := requireDB()
+	_, err := db.Exec("DELETE FROM subscriptions WHERE AND list=?", list)
+	if err != nil {
+		log.Printf("DATABASE_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+}
+
+// HELPER FUNCTIONS ///////////////////////////////////////////////////////////
+
+// Open the log file for logging
+func openLog() error {
+	logFile, err := os.OpenFile(gConfig.Log, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644)
+	if err != nil {
+		return err
+	}
+	out := io.MultiWriter(logFile, os.Stderr)
+	log.SetOutput(out)
+	return nil
+}
+
+// Open the log, or fail immediately
+func requireLog() {
+	err := openLog()
+	if err != nil {
+		log.Printf("LOG_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+}
+
+// Load gConfig from the on-disk config file
+func loadConfig() {
+	var (
+		err error
+		cfg *ini.File
+	)
+
+	if len(gConfig.ConfigFile) > 0 {
+		cfg, err = ini.Load(gConfig.ConfigFile)
+	} else {
+		cfg, err = ini.LooseLoad("nanolist.ini", "/usr/local/etc/nanolist.ini", "/etc/nanolist.ini")
+	}
+
+	if err != nil {
+		log.Printf("CONFIG_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+
+	err = cfg.Section("").MapTo(gConfig)
+	if err != nil {
+		log.Printf("CONFIG_ERROR Error=%q\n", err.Error())
+		os.Exit(0)
+	}
+
+	gConfig.Lists = make(map[string]*List)
+
+	for _, section := range cfg.ChildSections("list") {
+		list := &List{}
+		err = section.MapTo(list)
+		if err != nil {
+			log.Printf("CONFIG_ERROR Error=%q\n", err.Error())
+			os.Exit(0)
+		}
+		list.Id = strings.TrimPrefix(section.Name(), "list.")
+		gConfig.Lists[list.Address] = list
+	}
+}
+
+// Generate an email-able list of commands
+func commandInfo() string {
+	return fmt.Sprintf("    help\r\n"+
+		"      Information about valid commands\r\n"+
+		"\r\n"+
+		"    list\r\n"+
+		"      Retrieve a list of available mailing lists\r\n"+
+		"\r\n"+
+		"    subscribe <list-id>\r\n"+
+		"      Subscribe to <list-id>\r\n"+
+		"\r\n"+
+		"    unsubscribe <list-id>\r\n"+
+		"      Unsubscribe from <list-id>\r\n"+
+		"\r\n"+
+		"To send a command, email %s with the command as the subject.\r\n",
+		gConfig.CommandAddress)
+}