Fix thishost helper funtion in urllib. Returns the ipaddress of localhost when

hostname is resolvable by socket.gethostname for local machine. This all fixes
certain freebsd builtbot failures.

Lib/urllib.py

@@ -819,7 +819,10 @@ def thishost():
     """Return the IP address of the current host."""
     global _thishost
     if _thishost is None:
-        _thishost = socket.gethostbyname(socket.gethostname())
+        try:
+            _thishost = socket.gethostbyname(socket.gethostname())
+        except socket.gaierror:
+            _thishost = socket.gethostbyname('localhost')
     return _thishost
 
 _ftperrors = None