The upstream source was downloaded and packaged from the FreeBSD Subversion
repository. Take a look at the “debian/rules get-orig-source”.

Upstream Authors:

    The FreeBSD Project
    Ported by Guillem Jover <guillem@debian.org>

Copyright:

    Copyright (c) 1980-1983, 1985-1994 The Regents of the University of
    California.
    Copyright (c) 1994 Theo de Raadt
    Copyright (c) 1994, 1995 Gordon W. Ross
    Copyright (c) 1995 John T. Kohl
    Copyright (c) 1996 David Mazieres
    Copyright (c) 1998, 2000 Marshall Kirk McKusick.
    Copyright (c) 1999-2003 Robert N. M. Watson
    Copyright (c) 2000 Christoph Herrmann, Thomas-Henning von Kamptz
    Copyright (c) 2000-2003 Tor Egge
    Copyright (c) 2001, 2002 Ian Dowse
    Copyright (c) 2002 Poul-Henning Kamp
    Copyright (c) 2002-2003 Networks Associates Technology, Inc.
    Copyright (c) 2004 Guillem Jover
    Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>

License:

    Redistribution and use in source and binary forms, with or without
    modification, are permitted under the terms of the BSD License.

    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    SUCH DAMAGE.