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.

  This file intentionally does NOT reproduce the full GPLv3 legal text
inline (this build environment has no network access to fetch the
canonical document, and an inaccurate or incomplete transcription would
be worse than a clear pointer to the authoritative source). The complete,
authoritative, canonical text of the GNU General Public License,
Version 3, 29 June 2007, is available at:

      https://www.gnu.org/licenses/gpl-3.0.txt
      https://www.gnu.org/licenses/gpl-3.0.html

  TODO (maintainer action before the next release): replace this file
with the verbatim full text from the URL above, exactly as the FSF
publishes it, so the repository carries a self-contained copy as is
customary for GPL-licensed projects.

  This repository's source code is licensed under "GPL-3.0-or-later"
(SPDX-License-Identifier: GPL-3.0-or-later), meaning you may use it under
the terms of GPLv3 as published at the URL above, or (at your option) any
later version published by the Free Software Foundation.

  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 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/>.