#### basic_raw_socket::async_send

Start an asynchronous send on a connected socket.

    template<
        typename ConstBufferSequence,
        typename WriteHandler>
    void async_send(
        const ConstBufferSequence & buffers,
        WriteHandler handler);

    template<
        typename ConstBufferSequence,
        typename WriteHandler>
    void async_send(
        const ConstBufferSequence & buffers,
        socket_base::message_flags flags,
        WriteHandler handler);