Filter-gunzip is Copyright 2010, 2011, 2013, 2014 Kevin Ryde

Filter-gunzip is licensed under the GNU General Public License GPL
version 3 (or at your option any later version).  The complete text of
GPL version 3 is in the file

    /usr/share/common-licenses/GPL-3

Program home page:

    http://user42.tuxfamily.org/filter-gunzip/index.html