[reSIProcate] vocal licence is not gpl compatible

[Anatoly Yakovenko <aeyakovenko@xxxxxxxxx>]

I don't know if anyone has bugged you about this yet, but the VOCAL
licence is not gpl compatible due to the 4th clause in that licence.

* 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.

You dont actually need to have that clause in the licence if Vovida
Networks owns the trademark VOCAL.  If you guys really like the VOCAL
licence is there any chance to duel licencing the library under a more
GPL happy licence?

Thanks,
Anatoly