[PATCH stable] Separate multicast configuration for mesh and wlan interfaces.

[John Gilmore]

> The maximum number of multicast addresses per virtual device has been cut in
> half to ensure that the merged list can be accommodated by the hardware.

If we allocated DRAM this way, no process could use more than 1/N of
the memory, where N is the number of processes.  Surely this is
inappropriate.  If eth0 is not in use, msh0 should be able to use all of
the hardware's multicast addresses.  And vice verse, and all points in
between.  Signal an error to the caller when both devices combined
would exceed the hardware's capacity.

	John