This is a Debian native package.  The code is based on Joey Hess'
nslu2-flashkernel that used to be part of the nslu2-utils package.

Copyright:

Copyright (C) 2006  Joey Hess
Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2016  Martin Michlmayr <tbm@cyrius.com>
Copyright (C) 2011  Loïc Minier <lool@dooz.org>
Copyright (C) 2012-2016  Ian Campbell <ijc@debian.org>
Copyright (C) 2014-2016  Karsten Merker <merker@debian.org>
Copyright (C) 2015-2016  Roger Shimizu <rogershimizu@gmail.com>

    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.

    A copy of the GNU General Public License is available as
    `/usr/share/common-licenses/GPL-2' on Debian systems or on the World Wide
    Web at <URL:https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>.

The Debian packaging is licensed under the GPL, see above, and has
the following copyright:

Copyright (C) 2006, 2008  Martin Michlmayr <tbm@cyrius.com>