code: public static void localListenByLine(int port, Map<String, SocketAction> actions) {
          Sockets.localListenByLine(port, actions, DEFAULT_POOL_SIZE);
      }
docs: 简化了一个参数，采用默认线程数
  
  @see org.nutz.lang.socket.Sockets#localListenByLine(int, Map, int)