Copyright for bison++ source package in Focal

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: bison++
Source: ftp://ftp.iecc.com/pub/file/bison++flex++/

Files: *
Copyright: Copyright (C) 2014-2015 Alain Coetmeur,
 Copyright (C) Magnus Ekdahl 
License: GPL-2+

Files: debian/*
Copyright: 2016 Laszlo Boszormenyi (GCS) ,
 2004-     Jose Luis Tallon ,
 2001-2003 Magnus Ekdahl 
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.
 .
 This program 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.
 .
 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'.