message: Ensure connect future is Send
diff: @@ -661,7 +661,9 @@ async fn inet() {
  async fn check_send() {
  fn is_send<T: Send>(_: &T) {}
  - let mut client = connect("user=postgres").await;
  + let f = connect("user=postgres");
  + is_send(&f);
  + let mut client = f.await;
  let f = client.prepare("SELECT $1::TEXT");
  is_send(&f);
  