fix#692
The value of Content-Length is not checked for limits
when the semantics of an HTTP response indicate that
the message has no body. For example, when status is 101.
fix#653
Actions Required:
* Modify calls to set the control frame callback, to
pass non-const reference instances, and manage the
lifetime of the instance.
* read and async_read now return the number of bytes inserted
into the caller's buffer.
Actions Required:
* Change the signature of completion handlers used with
websocket::stream::async_read to void(error_code, std::size_t)
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
* static_buffer is added
Note this is the same name from two versions ago, when
static_buffer was renamed to flat_static_buffer for
consistency and to clear the name for a circular static
buffer.
Actions Required:
* Callers who depend on static_buffer returning sequences of
exactly length one should switch to flat_static_buffer.
