BUG/MEDIUM: checks: Destroy the conn-stream before the session

At the end of a tcp-check based health check, if there is still a connection
attached to the check, it must be closed. But it must be done before releasing
the session, because the session may still be referenced by the mux. For
instance, an h2 stream may still have a reference on the session.

No need to backport.
1 file changed