Preserve any additional arguments to ifconfig that were specified in the DHCP case too.
Preserve any additional arguments to ifconfig that were specified in the
DHCP case too.

PR:		bin/74406
Approved by:	jhb (proxy mentor)
MFC after:	3 days

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