Copyright for sheepdog source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Contact: MORITA Kazutaka , Liu Yuan 
Upstream-Name: sheepdog
Source: https://github.com/sheepdog/sheepdog

Files: debian/*
Copyright: 2010, Guido Günther 
	2012, YunQiang Su 
	2012, Thomas Goirand 
License: GPL-2

Files: *
Copyright: 2009-2011 Nippon Telegraph and Telephone Corporation
	With upstream authors as folow:
	2009-2011, MORITA Kazutaka 
	2009-2011, FUJITA Tomonori 
	2009-2011, MORIAI Satoshi 
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.
 .
 You should have received a copy of the GNU General Public License along with
 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
 St, Fifth Floor, Boston, MA 02110-1301 USA
 .
 On Debian systems, the complete text of the GNU General Public License v2
 (GPL) can be found in /usr/share/common-licenses/GPL-2.