Copyright for tuxpuck source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: TuxPuck
Source: http://home.no.net/munsuun/tuxpuck
Comment:
 The original project website is no longer available. Please see also
 https://wiki.debian.org/Games/TuxPuck for more information.

Files: *
Copyright: 2000-2002, Jacob "noork" Kroon 
                      Sam Lantinga 
                      Philippe Lavoie 
                      A. Schiffler 
                      Sven Velt 
License: GPL-2
Comment:
 See also thanks.txt for a complete list of contributors for TuxPack.

Files: debian/*
Copyright: 2002-2003, Sven Velt 
           2014-2018, Markus Koschany 
License: GPL-2

License: GPL-2
 On Debian systems, the full text of the GNU General Public License
 version 2 can be found in the file /usr/share/common-licenses/GPL-2.