This patch enables the node to respond to ARP requests for configured proxy ARP entries.
This patch enables the node to respond to ARP requests for
configured proxy ARP entries.

Reviewed by:	bz
MFC after:	immediately

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