Copyright for madbomber source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: madbomber
Source: http://www.newbreedsoftware.com/madbomber/

Files: *
Copyright: Copyright 2000 - 2006 William (Bill) Kendrick 
License: GPL-2
 Mad Bomber is distributed under the GNU GENERAL PUBLIC LICENSE.
 .
 On Debian GNU/Linux systems, the complete text of the GNU General Public 
 License is found in `/usr/share/common-licenses/GPL-2'.

Files: debian/*
Copyright: Copyright 2000 Christian T. Steigies 
License: GPL
 On Debian GNU/Linux systems, the complete text of the GNU General Public 
 License is found in `/usr/share/common-licenses/GPL'.