Network: do not crash if the bot has no network

urlchecker_network.py

@@ -49,6 +49,9 @@ def isTcpPortOpen(db, ip, port, status_id):
         if e.errno == errno.EHOSTUNREACH:
             # OSError: [Errno 113] No route to host
             state = "filtered"
+        elif e.errno == errno.ENETUNREACH:
+            # OSError: [Errno 101] Network is unreachable
+            state = "unreachable"
         else:
             raise