prboom a Doom port merged with LxDoom and LSDLDoom based on BOOM,
a modified and improved DOOM engine

Copyright (C) 1999 by
id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman

Copyright (C) 1999-2000 by
Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze

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, version 2, can be found in /usr/share/common-licenses/GPL-2.

Upstream Authors include:
Colin Robert Phipps <cph at users.sourceforge.net>
Nicolas Kalkhof <Figgi at users.sourceforge.net>
Jess Haas <jessh at users.sourceforge.net>
Florian Schulze <proff_fs at users.sourceforge.net>

prboom was debianized by Arthur Korn <arthur@korn.ch> on Mon, 13 Nov 2000
19:22:11 +0100. Maintenance from 2.2.3 to 2.2.6 was by Moritz Muehlenhoff
<jmm@inutil.org>, with review and sponsorship by Emanuele Rocca
<ema@debian.org>. Maintenance from 2.4.5 to present by Jon Dowland
<jon@alcopop.org> and the Debian Games Team.

prboom was downloaded from <http://prboom.sourceforge.net/linux.html>

The version of prboom distributed in Debian differs from upstream in the
following ways:

    * support for helper dogs is disabled and the helper dog
      resources are removed. This is because they are taken
      from Wolfenstein 3D (c) ID Software, all rights
      reserved.

    * Various menu graphics have been substituted as the originals
      are derived from menu graphics taken from Doom or Doom 2, both
      (c) ID Software and all rights reserved. The list of lumps
      replaced can be found in the file bad_menu_lumps.txt.

An upstream tarball can be modified with these changes using the script
"fix_upstream.sh" in the ./debian directory in the source package.