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- ---
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- title: MIT License
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- spdx-id: MIT
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- featured: true
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- hidden: false
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- description: A short and simple permissive license with conditions only requiring preservation of copyright and license notices. Licensed works, modifications, and larger works may be distributed under different terms and without source code.
 
 
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- how: Create a text file (typically named LICENSE or LICENSE.txt) in the root of your source code and copy the text of the license into the file. Replace [year] with the current year and [fullname] with the name (or names) of the copyright holders.
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- using:
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- Babel: https://github.com/babel/babel/blob/master/LICENSE
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- .NET: https://github.com/dotnet/runtime/blob/main/LICENSE.TXT
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- Rails: https://github.com/rails/rails/blob/master/MIT-LICENSE
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- permissions:
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- - commercial-use
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- - modifications
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- - distribution
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- - private-use
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- conditions:
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- - include-copyright
 
 
 
 
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- limitations:
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- - liability
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- - warranty
 
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- ---
 
 
 
 
 
 
 
 
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- MIT License
 
 
 
 
 
 
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- Copyright (c) [year] [fullname]
 
 
 
 
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- Permission is hereby granted, free of charge, to any person obtaining a copy
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- of this software and associated documentation files (the "Software"), to deal
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- in the Software without restriction, including without limitation the rights
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- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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- copies of the Software, and to permit persons to whom the Software is
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- furnished to do so, subject to the following conditions:
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- The above copyright notice and this permission notice shall be included in all
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- copies or substantial portions of the Software.
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- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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- SOFTWARE.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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+ GNU AFFERO GENERAL PUBLIC LICENSE
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+ Version 3, 19 November 2007
 
 
 
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+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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+ Everyone is permitted to copy and distribute verbatim copies
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+ Each time you convey a covered work, the recipient automatically
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+ receives a license from the original licensors, to run, modify and
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+ propagate that work, subject to this License. You are not responsible
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+ for enforcing compliance by third parties with this License.
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+
441
+ An "entity transaction" is a transaction transferring control of an
442
+ organization, or substantially all assets of one, or subdividing an
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+ organization, or merging organizations. If propagation of a covered
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+ work results from an entity transaction, each party to that
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+ transaction who receives a copy of the work also receives whatever
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+ licenses to the work the party's predecessor in interest had or could
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+ give under the previous paragraph, plus a right to possession of the
448
+ Corresponding Source of the work from the predecessor in interest, if
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+ the predecessor has it or can get it with reasonable efforts.
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+
451
+ You may not impose any further restrictions on the exercise of the
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+ rights granted or affirmed under this License. For example, you may
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+ not impose a license fee, royalty, or other charge for exercise of
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+ rights granted under this License, and you may not initiate litigation
455
+ (including a cross-claim or counterclaim in a lawsuit) alleging that
456
+ any patent claim is infringed by making, using, selling, offering for
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+ sale, or importing the Program or any portion of it.
458
+
459
+ 11. Patents.
460
+
461
+ A "contributor" is a copyright holder who authorizes use under this
462
+ License of the Program or a work on which the Program is based. The
463
+ work thus licensed is called the contributor's "contributor version".
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+
465
+ A contributor's "essential patent claims" are all patent claims
466
+ owned or controlled by the contributor, whether already acquired or
467
+ hereafter acquired, that would be infringed by some manner, permitted
468
+ by this License, of making, using, or selling its contributor version,
469
+ but do not include claims that would be infringed only as a
470
+ consequence of further modification of the contributor version. For
471
+ purposes of this definition, "control" includes the right to grant
472
+ patent sublicenses in a manner consistent with the requirements of
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+ this License.
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+
475
+ Each contributor grants you a non-exclusive, worldwide, royalty-free
476
+ patent license under the contributor's essential patent claims, to
477
+ make, use, sell, offer for sale, import and otherwise run, modify and
478
+ propagate the contents of its contributor version.
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+
480
+ In the following three paragraphs, a "patent license" is any express
481
+ agreement or commitment, however denominated, not to enforce a patent
482
+ (such as an express permission to practice a patent or covenant not to
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+ sue for patent infringement). To "grant" such a patent license to a
484
+ party means to make such an agreement or commitment not to enforce a
485
+ patent against the party.
486
+
487
+ If you convey a covered work, knowingly relying on a patent license,
488
+ and the Corresponding Source of the work is not available for anyone
489
+ to copy, free of charge and under the terms of this License, through a
490
+ publicly available network server or other readily accessible means,
491
+ then you must either (1) cause the Corresponding Source to be so
492
+ available, or (2) arrange to deprive yourself of the benefit of the
493
+ patent license for this particular work, or (3) arrange, in a manner
494
+ consistent with the requirements of this License, to extend the patent
495
+ license to downstream recipients. "Knowingly relying" means you have
496
+ actual knowledge that, but for the patent license, your conveying the
497
+ covered work in a country, or your recipient's use of the covered work
498
+ in a country, would infringe one or more identifiable patents in that
499
+ country that you have reason to believe are valid.
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+
501
+ If, pursuant to or in connection with a single transaction or
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+ arrangement, you convey, or propagate by procuring conveyance of, a
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+ covered work, and grant a patent license to some of the parties
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+ receiving the covered work authorizing them to use, propagate, modify
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+ or convey a specific copy of the covered work, then the patent license
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+ you grant is automatically extended to all recipients of the covered
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+ work and works based on it.
508
+
509
+ A patent license is "discriminatory" if it does not include within
510
+ the scope of its coverage, prohibits the exercise of, or is
511
+ conditioned on the non-exercise of one or more of the rights that are
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+ specifically granted under this License. You may not convey a covered
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+ work if you are a party to an arrangement with a third party that is
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+ in the business of distributing software, under which you make payment
515
+ to the third party based on the extent of your activity of conveying
516
+ the work, and under which the third party grants, to any of the
517
+ parties who would receive the covered work from you, a discriminatory
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+ patent license (a) in connection with copies of the covered work
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+ conveyed by you (or copies made from those copies), or (b) primarily
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+ for and in connection with specific products or compilations that
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+ contain the covered work, unless you entered into that arrangement,
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+ or that patent license was granted, prior to 28 March 2007.
523
+
524
+ Nothing in this License shall be construed as excluding or limiting
525
+ any implied license or other defenses to infringement that may
526
+ otherwise be available to you under applicable patent law.
527
+
528
+ 12. No Surrender of Others' Freedom.
529
+
530
+ If conditions are imposed on you (whether by court order, agreement or
531
+ otherwise) that contradict the conditions of this License, they do not
532
+ excuse you from the conditions of this License. If you cannot convey a
533
+ covered work so as to satisfy simultaneously your obligations under this
534
+ License and any other pertinent obligations, then as a consequence you may
535
+ not convey it at all. For example, if you agree to terms that obligate you
536
+ to collect a royalty for further conveying from those to whom you convey
537
+ the Program, the only way you could satisfy both those terms and this
538
+ License would be to refrain entirely from conveying the Program.
539
+
540
+ 13. Remote Network Interaction; Use with the GNU General Public License.
541
+
542
+ Notwithstanding any other provision of this License, if you modify the
543
+ Program, your modified version must prominently offer all users
544
+ interacting with it remotely through a computer network (if your version
545
+ supports such interaction) an opportunity to receive the Corresponding
546
+ Source of your version by providing access to the Corresponding Source
547
+ from a network server at no charge, through some standard or customary
548
+ means of facilitating copying of software. This Corresponding Source
549
+ shall include the Corresponding Source for any work covered by version 3
550
+ of the GNU General Public License that is incorporated pursuant to the
551
+ following paragraph.
552
+
553
+ Notwithstanding any other provision of this License, you have
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+ permission to link or combine any covered work with a work licensed
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+ under version 3 of the GNU General Public License into a single
556
+ combined work, and to convey the resulting work. The terms of this
557
+ License will continue to apply to the part which is the covered work,
558
+ but the work with which it is combined will remain governed by version
559
+ 3 of the GNU General Public License.
560
+
561
+ 14. Revised Versions of this License.
562
+
563
+ The Free Software Foundation may publish revised and/or new versions of
564
+ the GNU Affero General Public License from time to time. Such new versions
565
+ will be similar in spirit to the present version, but may differ in detail to
566
+ address new problems or concerns.
567
+
568
+ Each version is given a distinguishing version number. If the
569
+ Program specifies that a certain numbered version of the GNU Affero General
570
+ Public License "or any later version" applies to it, you have the
571
+ option of following the terms and conditions either of that numbered
572
+ version or of any later version published by the Free Software
573
+ Foundation. If the Program does not specify a version number of the
574
+ GNU Affero General Public License, you may choose any version ever published
575
+ by the Free Software Foundation.
576
+
577
+ If the Program specifies that a proxy can decide which future
578
+ versions of the GNU Affero General Public License can be used, that proxy's
579
+ public statement of acceptance of a version permanently authorizes you
580
+ to choose that version for the Program.
581
+
582
+ Later license versions may give you additional or different
583
+ permissions. However, no additional obligations are imposed on any
584
+ author or copyright holder as a result of your choosing to follow a
585
+ later version.
586
+
587
+ 15. Disclaimer of Warranty.
588
+
589
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
590
+ APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
591
+ HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
592
+ OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
593
+ THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
594
+ PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
595
+ IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
596
+ ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
597
+
598
+ 16. Limitation of Liability.
599
+
600
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
601
+ WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
602
+ THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
603
+ GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
604
+ USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
605
+ DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
606
+ PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
607
+ EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
608
+ SUCH DAMAGES.
609
+
610
+ 17. Interpretation of Sections 15 and 16.
611
+
612
+ If the disclaimer of warranty and limitation of liability provided
613
+ above cannot be given local legal effect according to their terms,
614
+ reviewing courts shall apply local law that most closely approximates
615
+ an absolute waiver of all civil liability in connection with the
616
+ Program, unless a warranty or assumption of liability accompanies a
617
+ copy of the Program in return for a fee.
618
+
619
+ END OF TERMS AND CONDITIONS
620
+
621
+ How to Apply These Terms to Your New Programs
622
+
623
+ If you develop a new program, and you want it to be of the greatest
624
+ possible use to the public, the best way to achieve this is to make it
625
+ free software which everyone can redistribute and change under these terms.
626
+
627
+ To do so, attach the following notices to the program. It is safest
628
+ to attach them to the start of each source file to most effectively
629
+ state the exclusion of warranty; and each file should have at least
630
+ the "copyright" line and a pointer to where the full notice is found.
631
+
632
+ <one line to give the program's name and a brief idea of what it does.>
633
+ Copyright (C) <year> <name of author>
634
+
635
+ This program is free software: you can redistribute it and/or modify
636
+ it under the terms of the GNU Affero General Public License as published by
637
+ the Free Software Foundation, either version 3 of the License, or
638
+ (at your option) any later version.
639
+
640
+ This program is distributed in the hope that it will be useful,
641
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
642
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
643
+ GNU Affero General Public License for more details.
644
+
645
+ You should have received a copy of the GNU Affero General Public License
646
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
647
+
648
+ Also add information on how to contact you by electronic and paper mail.
649
+
650
+ If your software can interact with users remotely through a computer
651
+ network, you should also make sure that it provides a way for users to
652
+ get its source. For example, if your program is a web application, its
653
+ interface could display a "Source" link that leads users to an archive
654
+ of the code. There are many ways you could offer source, and different
655
+ solutions will be better for different programs; see section 13 for the
656
+ specific requirements.
657
+
658
+ You should also get your employer (if you work as a programmer) or school,
659
+ if any, to sign a "copyright disclaimer" for the program, if necessary.
660
+ For more information on this, and how to apply and follow the GNU AGPL, see
661
+ <https://www.gnu.org/licenses/>.