> So, a multi-licensed file remains multi-licensed except when all authors
Not strictly true. They can either agree to a change and issue one or
they can convey to other parties the right to change the terms. The GPL
for example does this for version selection.
A multi-licensed work (note work not file - don't assume a file is a
boundary of a work) which conveys the choice of licence (as some bits of
ath5k did) allows a receiving party to choose the licence it wishes.
Failing that OpenBSD would have turned itself GPL by adding that file as
according to your argument "it must be distributed under *all* these
licensing terms concurrently".
Alan
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