PHPNuke license

[John Goerzen <jgoerzen@complete.org>]

Hello,

This is in /usr/share/doc/phpnuke/copyright:

Note from upstream author:

 ##############################################################################
 #                        I M P O R T A N T    N O T E                        #
 ##############################################################################
 # IMPORTANT: I saw many sites that removes the copyright line in the footer  #
 # of each page. YOU'RE NOT ALLOWED TO REMOVE NOR CHANGE/EDIT THAT NOTE. If I #
 # still see this problem happening I'll need to take extreme measures that   #
 # can include: to change the PHP-Nuke license, to encrypt some parts of the  #
 # code, stop distributing it for free and in an extreme case stop developing #
 # it. The decision is in your hands.                                         #
 # If you do not agreed with this simple rule, delete all PHP-Nuke files      #
 # right now and move away from it. Thanks.                                   #
 ##############################################################################

I think this is not good for the same reason as the BSD advertising clause.

The notice is:

"Web site engine's code is Copryight (C) 2002 by PHP-Nuke.  All Rights
Reserved.  PHP-Nuke is Free Software released under the GNU/GPL license."

This would seem to also prohibit modifications and derived works, since a
proper copyright notice would reflect the status of the modifier.