loadparm.c: Added new netbios aliases parameter (code from Cisco)

loadparm.c:	Added new netbios aliases parameter (code from Cisco)
nameannounce.c: Code to announce aliases as well as our own names.
namedbsubnet.c: Code to add the aliases to the server list.
nameserv.c:		Code to defend our aliases on the namelist.
namework.c:		Code to check it's one of our aliases.
nmbd.c:			Code to initialise the aliases.
proto.h:		Fixup protos.
util.c:			Code to check it's one of our aliases.
All above code based on code for 1.9.16p11 donated by Cisco
from Ben Woodard <bwoodard@luthien.cisco.com>
Jeremy (jallison@whistle.com)
(This used to be commit a2ce1c0cb1331551ff728dcfe3260fab4cd827e5)