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    1 GNU AFFERO GENERAL PUBLIC LICENSE
    2 
    3 Version 3, 19 November 2007
    4 
    5 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
    6 
    7 Everyone is permitted to copy and distribute verbatim copies of this license
    8 document, but changing it is not allowed.
    9 
   10 Preamble
   11 
   12 The GNU Affero General Public License is a free, copyleft license for software
   13 and other kinds of works, specifically designed to ensure cooperation with
   14 the community in the case of network server software.
   15 
   16 The licenses for most software and other practical works are designed to take
   17 away your freedom to share and change the works. By contrast, our General
   18 Public Licenses are intended to guarantee your freedom to share and change
   19 all versions of a program--to make sure it remains free software for all its
   20 users.
   21 
   22 When we speak of free software, we are referring to freedom, not price. Our
   23 General Public Licenses are designed to make sure that you have the freedom
   24 to distribute copies of free software (and charge for them if you wish), that
   25 you receive source code or can get it if you want it, that you can change
   26 the software or use pieces of it in new free programs, and that you know you
   27 can do these things.
   28 
   29 Developers that use our General Public Licenses protect your rights with two
   30 steps: (1) assert copyright on the software, and (2) offer you this License
   31 which gives you legal permission to copy, distribute and/or modify the software.
   32 
   33 A secondary benefit of defending all users' freedom is that improvements made
   34 in alternate versions of the program, if they receive widespread use, become
   35 available for other developers to incorporate. Many developers of free software
   36 are heartened and encouraged by the resulting cooperation. However, in the
   37 case of software used on network servers, this result may fail to come about.
   38 The GNU General Public License permits making a modified version and letting
   39 the public access it on a server without ever releasing its source code to
   40 the public.
   41 
   42 The GNU Affero General Public License is designed specifically to ensure that,
   43 in such cases, the modified source code becomes available to the community.
   44 It requires the operator of a network server to provide the source code of
   45 the modified version running there to the users of that server. Therefore,
   46 public use of a modified version, on a publicly accessible server, gives the
   47 public access to the source code of the modified version.
   48 
   49 An older license, called the Affero General Public License and published by
   50 Affero, was designed to accomplish similar goals. This is a different license,
   51 not a version of the Affero GPL, but Affero has released a new version of
   52 the Affero GPL which permits relicensing under this license.
   53 
   54 The precise terms and conditions for copying, distribution and modification
   55 follow.
   56 
   57 TERMS AND CONDITIONS
   58 
   59    0. Definitions.
   60 
   61    "This License" refers to version 3 of the GNU Affero General Public License.
   62 
   63 "Copyright" also means copyright-like laws that apply to other kinds of works,
   64 such as semiconductor masks.
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   97    1. Source Code.
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  133    The Corresponding Source for a work in source code form is that same work.
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  135    2. Basic Permissions.
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  137 All rights granted under this License are granted for the term of copyright
  138 on the Program, and are irrevocable provided the stated conditions are met.
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  145 You may make, run and propagate covered works that you do not convey, without
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  158    3. Protecting Users' Legal Rights From Anti-Circumvention Law.
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  160 No covered work shall be deemed part of an effective technological measure
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  172    4. Conveying Verbatim Copies.
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  174 You may convey verbatim copies of the Program's source code as you receive
  175 it, in any medium, provided that you conspicuously and appropriately publish
  176 on each copy an appropriate copyright notice; keep intact all notices stating
  177 that this License and any non-permissive terms added in accord with section
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  184    5. Conveying Modified Source Versions.
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  186 You may convey a work based on the Program, or the modifications to produce
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  190 a) The work must carry prominent notices stating that you modified it, and
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  193 b) The work must carry prominent notices stating that it is released under
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  197 c) You must license the entire work, as a whole, under this License to anyone
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  204 d) If the work has interactive user interfaces, each must display Appropriate
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  213 of the compilation's users beyond what the individual works permit. Inclusion
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  217    6. Conveying Non-Source Forms.
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  219 You may convey a covered work in object code form under the terms of sections
  220 4 and 5, provided that you also convey the machine-readable Corresponding
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  223 a) Convey the object code in, or embodied in, a physical product (including
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  225 on a durable physical medium customarily used for software interchange.
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  227 b) Convey the object code in, or embodied in, a physical product (including
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  242 d) Convey the object code by offering access from a designated place (gratis
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  261 A "User Product" is either (1) a "consumer product", which means any tangible
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  301 no special password or key for unpacking, reading or copying.
  302 
  303    7. Additional Terms.
  304 
  305 "Additional permissions" are terms that supplement the terms of this License
  306 by making exceptions from one or more of its conditions. Additional permissions
  307 that are applicable to the entire Program shall be treated as though they
  308 were included in this License, to the extent that they are valid under applicable
  309 law. If additional permissions apply only to part of the Program, that part
  310 may be used separately under those permissions, but the entire Program remains
  311 governed by this License without regard to the additional permissions.
  312 
  313 When you convey a copy of a covered work, you may at your option remove any
  314 additional permissions from that copy, or from any part of it. (Additional
  315 permissions may be written to require their own removal in certain cases when
  316 you modify the work.) You may place additional permissions on material, added
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  320 Notwithstanding any other provision of this License, for material you add
  321 to a covered work, you may (if authorized by the copyright holders of that
  322 material) supplement the terms of this License with terms:
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  324 a) Disclaiming warranty or limiting liability differently from the terms of
  325 sections 15 and 16 of this License; or
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  328 attributions in that material or in the Appropriate Legal Notices displayed
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  346 All other non-permissive additional terms are considered "further restrictions"
  347 within the meaning of section 10. If the Program as you received it, or any
  348 part of it, contains a notice stating that it is governed by this License
  349 along with a term that is a further restriction, you may remove that term.
  350 If a license document contains a further restriction but permits relicensing
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  355 If you add terms to a covered work in accord with this section, you must place,
  356 in the relevant source files, a statement of the additional terms that apply
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  359 Additional terms, permissive or non-permissive, may be stated in the form
  360 of a separately written license, or stated as exceptions; the above requirements
  361 apply either way.
  362 
  363    8. Termination.
  364 
  365 You may not propagate or modify a covered work except as expressly provided
  366 under this License. Any attempt otherwise to propagate or modify it is void,
  367 and will automatically terminate your rights under this License (including
  368 any patent licenses granted under the third paragraph of section 11).
  369 
  370 However, if you cease all violation of this License, then your license from
  371 a particular copyright holder is reinstated (a) provisionally, unless and
  372 until the copyright holder explicitly and finally terminates your license,
  373 and (b) permanently, if the copyright holder fails to notify you of the violation
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  375 
  376 Moreover, your license from a particular copyright holder is reinstated permanently
  377 if the copyright holder notifies you of the violation by some reasonable means,
  378 this is the first time you have received notice of violation of this License
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  380 to 30 days after your receipt of the notice.
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  382 Termination of your rights under this section does not terminate the licenses
  383 of parties who have received copies or rights from you under this License.
  384 If your rights have been terminated and not permanently reinstated, you do
  385 not qualify to receive new licenses for the same material under section 10.
  386 
  387    9. Acceptance Not Required for Having Copies.
  388 
  389 You are not required to accept this License in order to receive or run a copy
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  391 a consequence of using peer-to-peer transmission to receive a copy likewise
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  397    10. Automatic Licensing of Downstream Recipients.
  398 
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  417 or counterclaim in a lawsuit) alleging that any patent claim is infringed
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  419 any portion of it.
  420 
  421    11. Patents.
  422 
  423 A "contributor" is a copyright holder who authorizes use under this License
  424 of the Program or a work on which the Program is based. The work thus licensed
  425 is called the contributor's "contributor version".
  426 
  427 A contributor's "essential patent claims" are all patent claims owned or controlled
  428 by the contributor, whether already acquired or hereafter acquired, that would
  429 be infringed by some manner, permitted by this License, of making, using,
  430 or selling its contributor version, but do not include claims that would be
  431 infringed only as a consequence of further modification of the contributor
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  433 grant patent sublicenses in a manner consistent with the requirements of this
  434 License.
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  436 Each contributor grants you a non-exclusive, worldwide, royalty-free patent
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  439 of its contributor version.
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  441 In the following three paragraphs, a "patent license" is any express agreement
  442 or commitment, however denominated, not to enforce a patent (such as an express
  443 permission to practice a patent or covenant not to s ue for patent infringement).
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  447 If you convey a covered work, knowingly relying on a patent license, and the
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  451 cause the Corresponding Source to be so available, or (2) arrange to deprive
  452 yourself of the benefit of the patent license for this particular work, or
  453 (3) arrange, in a manner consistent with the requirements of this License,
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  455 
  456 license to downstream recipients. "Knowingly relying" means you have actual
  457 knowledge that, but for the patent license, your conveying the covered work
  458 in a country, or your recipient's use of the covered work in a country, would
  459 infringe one or more identifiable patents in that country that you have reason
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  469 A patent license is "discriminatory" if it does not include within the scope
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  480 you entered into that arrangement, or that patent license was granted, prior
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  482 
  483 Nothing in this License shall be construed as excluding or limiting any implied
  484 license or other defenses to infringement that may otherwise be available
  485 to you under applicable patent law.
  486 
  487    12. No Surrender of Others' Freedom.
  488 
  489 If conditions are imposed on you (whether by court order, agreement or otherwise)
  490 that contradict the conditions of this License, they do not excuse you from
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  495 not convey it at all. For example, if you agree to terms that obligate you
  496 to collect a royalty for further conveying from those to whom you convey the
  497 Program, the only way you could satisfy both those terms and this License
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  499 
  500    13. Remote Network Interaction; Use with the GNU General Public License.
  501 
  502 Notwithstanding any other provision of this License, if you modify the Program,
  503 your modified version must prominently offer all users interacting with it
  504 remotely through a computer network (if your version supports such interaction)
  505 an opportunity to receive the Corresponding Source of your version by providing
  506 access to the Corresponding Source from a network server at no charge, through
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  508 Corresponding Source shall include the Corresponding Source for any work covered
  509 by version 3 of the GNU General Public License that is incorporated pursuant
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  512 Notwithstanding any other provision of this License, you have permission to
  513 link or combine any covered work with a work licensed under version 3 of the
  514 GNU General Public License into a single combined work, and to convey the
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  517 governed by version 3 of the GNU General Public License.
  518 
  519    14. Revised Versions of this License.
  520 
  521 The Free Software Foundation may publish revised and/or new versions of the
  522 GNU Affero General Public License from time to time. Such new versions will
  523 be similar in spirit to the present version, but may differ in detail to address
  524 new problems or concerns.
  525 
  526 Each version is given a distinguishing version number. If the Program specifies
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  528 any later version" applies to it, you have the option of following the terms
  529 and conditions either of that numbered version or of any later version published
  530 by the Free Software Foundation. If the Program does not specify a version
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  534 If the Program specifies that a proxy can decide which future versions of
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  537 for the Program.
  538 
  539 Later license versions may give you additional or different permissions. However,
  540 no additional obligations are imposed on any author or copyright holder as
  541 a result of your choosing to follow a later version.
  542 
  543    15. Disclaimer of Warranty.
  544 
  545 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
  546 LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
  547 OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
  548 EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  549 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
  550 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM
  551 PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
  552 CORRECTION.
  553 
  554    16. Limitation of Liability.
  555 
  556 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL
  557 ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM
  558 AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
  559 INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO
  560 USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED
  561 INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
  562 PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
  563 PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
  564 
  565    17. Interpretation of Sections 15 and 16.
  566 
  567 If the disclaimer of warranty and limitation of liability provided above cannot
  568 be given local legal effect according to their terms, reviewing courts shall
  569 apply local law that most closely approximates an absolute waiver of all civil
  570 liability in connection with the Program, unless a warranty or assumption
  571 of liability accompanies a copy of the Program in return for a fee. END OF
  572 TERMS AND CONDITIONS
  573 
  574 How to Apply These Terms to Your New Programs
  575 
  576 If you develop a new program, and you want it to be of the greatest possible
  577 use to the public, the best way to achieve this is to make it free software
  578 which everyone can redistribute and change under these terms.
  579 
  580 To do so, attach the following notices to the program. It is safest to attach
  581 them to the start of each source file to most effectively state the exclusion
  582 of warranty; and each file should have at least the "copyright" line and a
  583 pointer to where the full notice is found.
  584 
  585 <one line to give the program's name and a brief idea of what it does.>
  586 
  587 Copyright (C) <year> <name of author>
  588 
  589 This program is free software: you can redistribute it and/or modify it under
  590 the terms of the GNU Affero General Public License as published by the Free
  591 Software Foundation, either version 3 of the License, or (at your option)
  592 any later version.
  593 
  594 This program is distributed in the hope that it will be useful, but WITHOUT
  595 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  596 FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
  597 details.
  598 
  599 You should have received a copy of the GNU Affero General Public License along
  600 with this program. If not, see <https://www.gnu.org/licenses/>.
  601 
  602 Also add information on how to contact you by electronic and paper mail.
  603 
  604 If your software can interact with users remotely through a computer network,
  605 you should also make sure that it provides a way for users to get its source.
  606 For example, if your program is a web application, its interface could display
  607 a "Source" link that leads users to an archive of the code. There are many
  608 ways you could offer source, and different solutions will be better for different
  609 programs; see section 13 for the specific requirements.
  610 
  611 You should also get your employer (if you work as a programmer) or school,
  612 if any, to sign a "copyright disclaimer" for the program, if necessary. For
  613 more information on this, and how to apply and follow the GNU AGPL, see <https://www.gnu.org/licenses/>.