Copyright for cfv source package in Xenial

This package was debianized by Matthew Mueller  on
Fri, 30 Jun 2000 15:35:14 -0700.

Upstream Author: Matthew Mueller.

This software is Copyright (c) 2000-2009 by Matthew Mueller.

    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.

On Debian systems, the complete text of the GNU General Public
License can be found in /usr/share/common-licenses/GPL-2 file.