Function accept_hdr_with_config_async 

pub async fn accept_hdr_with_config_async<S, T, C>(
    stream: T,
    callback: C,
    config: impl Into<Config>,
) -> Result<WebSocketStream<S>, Error>
where
    S: AsFd + 'static,
    T: IntoMaybeTlsStream<S>,
    C: Callback + Unpin,

Available on crate feature ws only.

Similar to accept_hdr_async() but user can specify a Config.