nmbd would core dump if a large number of netbios aliases is set. The

nmbd would core dump if a large number of netbios aliases is set. The
problem was a buffer overflow in process_node_status_request().

this really points out a general problem is allocating MAX_DGRAM_SIZE
packets on the stack in nmbd. There must be a better way.
(This used to be commit 7db45f169c33e0f3a67ba2260049226992de8bdf)