Copyright for vnstat source package in Bionic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: vnstat
Upstream-Contact: Teemu Toivola 
Source: http://humdi.net/vnstat/
  
Files: *
Copyright: Copyright (c) 2002-2017 Teemu Toivola 
License: GPL-2

Files: examples/vnstat.cgi
Copyright: copyright (c) 2008-2009 Teemu Toivola 
           copyright (c) 2000-2007 ETH Zurich
           copyright (c) 2000-2007 David Schweikert 
License: GPL-any
 Unspecified GPL license.
 
Files: debian/*
Copyright: Copyright (C) 2004 Teemu Toivola 
           Copyright (C) 2006-2010 Aurélien GÉRÔME 
           Copyright (C) 2010 Iulian Udrea 
           Copyright (C) 2013-2017 Felix Geyer 
           Copyright (C) 2017 Christian Göttsche 
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 version 2 as
 published by the Free Software Foundation.
 .
 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
 28 License can be found in the file `/usr/share/common-licenses/GPL-2'.