message: Use &wait instead of wait.iter()
diff: @@ -423,7 +423,7 @@ impl Connection<Authenticated> {
  thread::yield_now();
  let mut cur_len = wbuf.lock().unwrap().writer.buffer().len();
  if cur_len != start_len {
  - for d in wait.iter() {
  + for d in &wait {
  thread::sleep(*d);
  {
  let w = wbuf.lock().unwrap();
  