Copyright for pwgen source package in Buster

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: pwgen
Upstream-Contact: tytso@mit.edu
Source: https://github.com/tytso/pwgen

Files: *
Copyright: 2001, 2002, 2005, 2006, 2014 Theodore Ts'o 
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, v2, 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
 .
 On Debian systems, the complete text of the GNU General Public
 License version 2 can be found in `/usr/share/common-licenses/GPL-2'.