Don't just die if gethostbyaddr() fails -- as it can when DNS is

unreachable -- but fall back to using whatever hostname we have.

Lib/BaseHTTPServer.py

@@ -93,7 +93,11 @@ class HTTPServer(SocketServer.TCPServer):
         host, port = self.socket.getsockname()
         if not host or host == '0.0.0.0':
             host = socket.gethostname()
+        try:
             hostname, hostnames, hostaddrs = socket.gethostbyaddr(host)
+        except socket.error:
+            hostname = host
+        else:
             if '.' not in hostname:
                 for host in hostnames:
                     if '.' in host: