catch some rocksock errors

this allows ppf to skip checks when a theorical proxy fails in certain manners

proxywatchd.py

@@ -48,6 +48,14 @@ class WorkerJob():
 				return sock, proto, duration, torhost, srv
 			except KeyboardInterrupt as e:
 				raise(e)
+			except rocksock.RocksockException as e:
+				## tor cannot connect
+				if e.failedproxy == None: break
+				## connexion failed
+				elif int(e.error) in [12, 13, 20, 24]: break
+				## generic errors
+				#elif int(e.error) == 7: continue
+				#print('proxy#: %s, errortype: %s, error: %s' % (e.failedproxy, e.errortype, e.error))
 			except: sock.disconnect()
 
 		return None, None, None, None, None