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.

(cherry picked from commit ac03ef26e8b81461c2585cc42c1bbaa2ceb878ee)
[ad: move function from connection.c to connection.h]
Signed-off-by: Amaury Denoyelle <adenoyelle@haproxy.com>
3 files changed