Paul Davis wrote:
You read it wrong. For two different reasons. First,
the same mistake
than Arnold made earlier. The GPL (whatever version) is the text that
lays out the terms of a license. Anyone can refer to this text but then
add exceptions, extensions. I can even say "Its licensed under the terms
of GPLv3 excluding every clause, plus the follow paragraph...".
Well,
what's more, at least one well known project from Free Software
Foundation uses exactly that: GPL plus "special exception" changing the
conditions slightly (allowing for use in other software without making
them covered by GPL).
I think it may be a good reason to think that such practices are
allowed/approved by FSF.
Krzysztof