Make nebula advertise its dynamic port to lighthouses (#653)

main.go

@@ -158,15 +158,6 @@ func Main(c *config.C, configTest bool, buildVersion string, logger *logrus.Logg
 			}
 			udpServer.ReloadConfig(c)
 			udpConns[i] = udpServer
-
-			// If port is dynamic, discover it
-			if port == 0 {
-				uPort, err := udpServer.LocalAddr()
-				if err != nil {
-					return nil, util.NewContextualError("Failed to get listening port", nil, err)
-				}
-				port = int(uPort.Port)
-			}
 		}
 	}