* Use the httputil.NewSingleHostReverseProxy instad of yhat/wsutil for websocket proxying. This correctly handles 404 responses with keep-alive by terminating the tunnel rather than keeping it alive
* Tidy up dependencies - yhat/wsutil is no longer required
* Update changelog to include reference to 1348
Co-authored-by: Matt Lilley <matt.lilley@securitease.com>
Co-authored-by: Joel Speed <Joel.speed@hotmail.co.uk>