Copyright for l2tpns source package in Jammy

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: l2tpns
Upstream-Contact: l2tpns devs 
Source: https://code.ffdn.org/l2tpns/l2tpns

Files: *
Copyright: 2002 FireBrick (Andrews & Arnold Ltd / Watchfront Ltd)
           2002 Adrian Kennard
           2003-2006 Optus Internet Engineering
           2003-2004 David Parrish 
           2004-2011 Brendan O'Dea , 
           2012 Benjamin Cama 
           2012-2017 Fernando Alves 
           2020 Julien Rabier 
License: GPL+

Files: md5.*
Copyright: 2001 Solar Designer 
License: public-domain
 Written by Solar Designer  in 2001, and placed
 in the public domain.  There's absolutely no warranty.

Files: debian/*
Copyright: 2004-2016 Jonathan McDowell 
           2020 Samuel Thibault 
           2020 Sebastien Badia 
License: GPL+

License: GPL+
 You are free to distribute this software under the terms of the GNU
 General Public License. The full text of this license can be found
 in the file /usr/share/common-licenses/GPL