Fix build with alpn feature

    /// This method needs the `alpn` feature.

    #[cfg(feature = "alpn")]

    pub fn get_selected_alpn_protocol(&self) -> Option<&[u8]> {

        self.ssl.get_selected_alpn_protocol()

        self.kind.ssl().get_selected_alpn_protocol()

    }

    /// pending() takes into account only bytes from the TLS/SSL record that is currently being processed (if any).

#[test]

#[cfg(feature = "alpn")]

fn test_alpn_server_advertise_multiple() {

    let localhost = "127.0.0.1:15420";

    let localhost = "127.0.0.1:15421";

    let listener = TcpListener::bind(localhost).unwrap();

    // We create a different context instance for the server...

    let listener_ctx = {

    // Have the listener wait on the connection in a different thread.

    thread::spawn(move || {

        let (stream, _) = listener.accept().unwrap();

        let _ = SslStream::new_server(&listener_ctx, stream).unwrap();

        let _ = SslStream::accept(&listener_ctx, stream).unwrap();

    });

    let mut ctx = SslContext::new(Sslv23).unwrap();