message: remove check of the backlog parameter
  The check should be done by the implementation of the trait.
diff: @@ -85,13 +85,9 @@ pub(crate) extern "C" fn __sys_accept(
  }
  pub(crate) extern "C" fn __sys_listen(fd: i32, backlog: i32) -> i32 {
  - if backlog > 1 {
  - -EINVAL
  - } else {
  let obj = get_object(fd);
  obj.map_or_else(|e| e, |v| (*v).listen(backlog))
  }
  -}
  pub(crate) extern "C" fn __sys_bind(fd: i32, name: *const sockaddr, namelen: socklen_t) -> i32 {
  let obj = get_object(fd);
  