[MEDIUM] listeners: don't change listeners states anymore in maintain_proxies

Now maintain_proxies() only changes proxies states and does not affect their
listeners anymore since they are autonomous. A proxy will switch between the
PR_STIDLE and PR_STRUN states depending whether it's saturated or not. Next
step will consist in renaming PR_STIDLE to PR_STFULL. This state is now only
used to report the proxy state in the stats.
1 file changed