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Licensing of package nauty

Nauty [1] is pretty much the standard software for graph isomorphism
testing, and is used by a several other pieces of research software
(e.g. polymake, which I have ITPed [2]).  Unfortunately from the
Debian point of view, the distribution conditions are somewhat

	Copyright (1984-2007) Brendan McKay. All rights
	reserved. Permission is hereby given for use and/or
	distribution with the exception of sale for profit or
	application with nontrivial military significance. You must
	not remove this copyright notice, and you must document any
	changes that you make to this program. This software is
	subject to this copyright only, irrespective of any copyright
	attached to any package of which this is a part.
	 Absolutely no guarantees or warranties are made concerning
	 the suitability, correctness, or any other aspect of this
	 program. Any use is at your own risk.

I can ask the author if would distribute under some DFSG free license,
but in the case that he declines, is there any other clarification
needed before it can be included in non-free?


PS no-need to CC me, I'll follow the discussion via gmane

[1] http://cs.anu.edu.au/~bdm/nauty/
[2] http://bugs.debian.org/461976

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