WebSocket optimizations (API Change):

The websocket stream is optimized to contain a small
circular static buffer, reducing the number of I/O calls when
reading data. The size of the buffer is tuned for maximum
performance with TCP/IP and no long needs configuration:

* read_some replaces read_frame
* write_some replaces write_Frame
* async_read_some replaces async_read_frame
* async_write_some replaces async_write_frame

* websocket::stream::read_buffer_size is removed

Actions Required:

* Remove calls websocket::stream::read_buffer_size

* Use read_some and write_some instead of read_frame and write_frame

test/wstest/main.cpp

@@ -167,7 +167,7 @@ private:
     {
         std::geometric_distribution<std::size_t> dist{
             double(4) / boost::asio::buffer_size(tb_)};
-        ws_.async_write_frame(true,
+        ws_.async_write_some(true,
             beast::buffer_prefix(dist(rng_), tb_),
             alloc_.wrap(std::bind(
                 &connection::on_write,