See https://extensions.xwiki.org/xwiki/bin/view/Extension/Realtime%20Netflux%20Backend/ . This is needed by the real-time editing extensions.
Cleanup and integrate the Netflux front-end (realtime-netflux-frontend)
Add support for writing WebSocket end-points as XWiki components
Add support for deploying WebSocket end-points to the standalone Jetty package
Add support for writing WebSocket end-points that rely on the XWiki context