                    GNU GENERAL PUBLIC LICENSE
                       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                            Preamble

 The licenses for most software are designed to take away your
 freedom to share and change it. By contrast, the GNU General Public
 License is intended to guarantee your freedom to share and change
 free software--to make sure the software is free for all its users.
 This General Public License applies to most of the Free Software
 Foundation's software and to any other program whose authors commit
 to using it. (Some other Free Software Foundation software is
 covered by the GNU Lesser General Public License instead.) You can
 apply it to your programs, too.

 ...

 (※ 以下全文が続きます。全文を含むライセンスはこちらにあります:
 https://www.gnu.org/licenses/old-licenses/gpl-2.0.txt)