Copyright for ytree source package in Jammy

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: ytree
Source: http://www.han.de/~werner/ytree.html

Files: *
Copyright: ?-2016 Werner Bregulla 
License: GPL-2

Files: mktime.c
Copyright: 1988-1989 David MacKenzie 
           1988-1989 Michael Haertel 
License: Special

Files: tilde.c
       tilde.h
       xmalloc.c
       xmalloc.h
Copyright: 1988-1999 Free Software Foundation, Inc.
License: GPL-2+

Files: debian/*
Copyright: 1998-2006 Carlos Barros 
           2008      Barry deFreese 
           2008      Cyril Brulebois 
           2008-2016 Kevin Coyner 
           2011      Steve McIntyre 
           2019      William Grzybowski 
License: GPL-2+

License: GPL-2 or GPL-2+
 This package 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.
 .
 This package is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 .
 You should have received a copy of the GNU General Public License
 along with this program. If not, see 
 .
 On Debian systems, the complete text of the GNU General
 Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".

License: Special
 Unlimited distribution permitted provided this copyright notice is
 retained and any functional modifications are prominently identified.