[B.A.T.M.A.N.] Basic Multicast Optimizations

["Linus Lüssing" <linus.luessing@web.de>]

This is the seventh revision of the basic multicast optimization patches.

It adds the style changes as suggested by Marek via eMail.

It also adds various suggestion from IRC (for instance adding kerneldoc for the
functions touched in translation-table.c, making the counter an atomic
one to be on the safe side for some "exotic" targets).


PATCHv7 4/4 is a new one and the result of a longer discussion on IRC:
Whether to add some support for some IPv4 addresses already for the cost of
a slightly larger complexity both code and documentation wise
- for a case which is uncommon for most mesh networks anyway: a mesh
with no bridges on any node involved.

So the fourth patch is sort of an RFC patch one, too (although the consense/
tendency on IRC so far was to add and support this case).

If everyone is fine with that concept, then I can also easily merge it
into patches 2/4 and 3/4 (if that is desired).

Cheers, Linus