While updating Mandriva RPM for 4.3.5 it caught my attention that SPEC states 
License: GPL. Now, that is wrong as far as I can tell; Zsh is not under GPL 
license and it IIRC several times it was mentioned on zsh-workers that Zsh won't 
be put under GPL (I may be wrong here).

This poses several questions.

If we need License tag in RPM - how should it be called? Zsh comes with LICENSE 
file but that is not anything from "commonly used" license.

Possibly more question to zsh-workers - should I remove License: GPL from 
Mandriva RPM?

To cooker - if we cannot put any "common" open source license tag in zsh RPM - 
is it allowed to be distributed via main repository?

For reference, below is contents of LICENSE file that comes with Zsh:

The Z Shell is copyright (c) 1992-2007 Paul Falstad, Richard Coleman,
Zoltán Hidvégi, Andrew Main, Peter Stephenson, Sven Wischnowsky, and
others.  All rights reserved.  Individual authors, whether or not
specifically named, retain copyright in all changes; in what follows, they
are referred to as `the Zsh Development Group'.  This is for convenience
only and this body has no legal status.  The Z shell is distributed under
the following licence; any provisions made in individual files take
precedence.

Permission is hereby granted, without written agreement and without
licence or royalty fees, to use, copy, modify, and distribute this
software and to distribute modified versions of this software for any
purpose, provided that the above copyright notice and the following
two paragraphs appear in all copies of this software.

In no event shall the Zsh Development Group be liable to any party for
direct, indirect, special, incidental, or consequential damages arising out
of the use of this software and its documentation, even if the Zsh
Development Group have been advised of the possibility of such damage.

The Zsh Development Group specifically disclaim any warranties, including,
but not limited to, the implied warranties of merchantability and fitness
for a particular purpose.  The software provided hereunder is on an "as is"
basis, and the Zsh Development Group have no obligation to provide
maintenance, support, updates, enhancements, or modifications.