r1897: added a choose_called_name() function that allows us to more sanely

r1897: added a choose_called_name() function that allows us to more sanely
handle connections using the IP as the server name, while not trying
for NBT name resolution on names like "192" and "192.168.1.2".

also removed the ip address argument to smbcli_socket_connect() as it
isn't used and doesn't really make sense.
(This used to be commit 2ce4028842556328da4da0de9bee942bed02cc62)