binary, text are members of stream (API Change):

fix #446

* message_type is removed

Actions Required:

* Change call sites which use message_type with set_option
  to call stream::binary or stream::text instead.

examples/websocket_async_echo_server.hpp

@@ -230,8 +230,7 @@ private:
                     return fail("async_read", ec);
                 // write message
                 d.state = 1;
-                d.ws.set_option(
-                    beast::websocket::message_type(d.op));
+                d.ws.binary(d.op == beast::websocket::opcode::binary);
                 d.ws.async_write(d.db.data(),
                     d.strand.wrap(std::move(*this)));
                 return;