MINOR: connection: add alternative mux_ops param for conn_install_mux_be

Add a new parameter force_mux_ops. This will be useful to specify an
alternative to the srv->mux_proto field. If non-NULL, it will be use to
force the mux protocol wether srv->mux_proto is set or not.

This argument will become useful to install a mux for non-standard
streams, most notably websocket streams.
3 files changed