message: Happy Eyeballs follows RFC6555 300ms
diff: @@ -55,7 +55,9 @@ macro_rules! lookup_then_connect {
  assert!(has_v4 || has_v6, "resolved empty address");
  // Happy Eyeballs, RFC6555, RFC8305
  - const FIXED_DELAY: Duration = Duration::from_millis(200);
  + //
  + // RFC6555 gives an example that Chrome and Firefox uses 300ms
  + const FIXED_DELAY: Duration = Duration::from_millis(300);
  // Connects every addresses synchronously.
  // TODO: Try another address after FIXED_DELAY if one of the IPs is unreachable.
  