Copyright for pptpd source package in Xenial

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: poptop
Source: http://poptop.sourceforge.net/dox/

Files: *
Copyright: James Cameron  et.al.
Comment: See AUTHORS for full list
License: GPL-2.0+

Files: bcrelay.8
Copyright: Nguyen Vinh
License: GPL-2.0+

Files:
    getopt.c
    our_getopt.h
Copyright: 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99
    Free Software Foundation, Inc.
License: GPL-2.0+

License: GPL-2.0+
 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".