Copyright for octave-gsl source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: GSL package for Octave
Upstream-Contact: Octave-Forge community 
Source: http://octave.sourceforge.net/gsl/index.html

Files: *
Copyright: 2004 Teemu Ikonen 
           2016 Susi Lehtola
           2016 Julien Bect 
License: GPL-2+

Files: inst/gsl_sf_test.m
Copyright: 2016 Susi Lehtola
           2016-2017 Julien Bect 
License: GPL-3+

Files: Makefile
Copyright: 2015-2016 Carnë Draug
           2015-2016 Oliver Heimlich
           2017 Julien Bect 
           2017 Olaf Till 
License: permissive
 Copying and distribution of this file, with or without modification,
 are permitted in any medium without royalty provided the copyright
 notice and this notice are preserved.  This file is offered as-is,
 without any warranty.

Files: debian/*
Copyright: 2008 Ólafur Jens Sigurðsson 
           2008-2011 Thomas Weber 
           2008-2012 Rafael Laboissiere 
           2012-2017 Sébastien Villemot 
License: GPL-3+

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.
 .
 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 the file
 `/usr/share/common-licenses/GPL-2'.

License: GPL-3+
 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 3 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.
 .
 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 3, can be found in the file
 `/usr/share/common-licenses/GPL-3'.