Apply the MAC label to an outgoing UDP packet when other inpcb properties are processed, meaning that we avoid the cost of MAC label assignment if we're going to drop the packet due to mbuf exhaustion, etc.
Apply the MAC label to an outgoing UDP packet when other inpcb properties are
processed, meaning that we avoid the cost of MAC label assignment if we're
going to drop the packet due to mbuf exhaustion, etc.

MFC after:	3 weeks

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase