Copyright for xbill source package in Lunar

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: XBill
Upstream-Contact: Brian Wellington 
Source: http://www.xbill.org/

Files: *
Copyright: 1994-2001 Brian Wellington 
           1994-2001 Matias Duarte 
License: GPL-2+

Files: debian/*
Copyright: 1997-2006 Adrian Bridgett 
License: GPL-2+

License: GPL-2+
 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 2 of the License, or
 (at your option) any later version.
 .
 On Debian GNU/Linux systems, the complete text of the GNU General Public
 License version 2 can be found in `/usr/share/common-licenses/GPL-2'.