Start an asynchronous SSL handshake.
template< typename HandshakeHandler = DEFAULT> DEDUCED async_handshake( handshake_type type, HandshakeHandler && handler = DEFAULT); » more... template< typename ConstBufferSequence, typename BufferedHandshakeHandler = DEFAULT> DEDUCED async_handshake( handshake_type type, const ConstBufferSequence & buffers, BufferedHandshakeHandler && handler = DEFAULT); » more...