replaced the "wins proxy" to treat NetBIOS names as DNS names with new

replaced the "wins proxy" to treat NetBIOS names as DNS names with new
"dns proxy" option.  the "wins proxy" option should be used for broadcast
only hosts, and isn't properly implemented anyway.

the new "dns proxy" option can be disabled if the (blocking) dns resolution
takes up a significant amount of time.  this _will_ occur if gethostbyname
does external DNS lookups, instead of just (immediately) returning entries
in /etc/hosts.

lkcl
(This used to be commit 350dfc57dd3001ba27519000a2ab9dd541a66ac7)