forked from boostorg/beast
fix #849 This adds an additional `bool` template parameter to `websocket::stream`: * When deflateSupported is `true`, the stream will be capable of negotiating the permessage-deflate websocket extension per the configured run-time settings. * When deflateSupported is `false`, the stream will never negotiate the permessage-deflate websocket extension. Furthermore, all of the code necessary for implementing the permessage-deflate extension will be excluded from function instantiations. The resulting emitted object code should be smaller.