message: Modify the default value of package_body_offset to 4.
diff: @@ -45,7 +45,7 @@ void swPort_init(swListenPort *port)
  port->protocol.package_length_type = 'N';
  port->protocol.package_length_size = 4;
  - port->protocol.package_body_offset = 0;
  + port->protocol.package_body_offset = 4;
  port->protocol.package_max_length = SW_BUFFER_INPUT_SIZE;
  port->socket_buffer_size = SwooleG.socket_buffer_size;
  