Use the new cli_serve stuff, as ammended.

Give cli's an "auth level" and only allow the commands with lower
auth levels than what the cli has collected.  Use this to implement
the -S handling.  In the future, we can also use it to do "R/O" vs. "R/W"
command separation.

Add a param (syslog_cli_traffic) to control if all CLI traffic is syslog'ed.

Everything should work the same, as far as I know.



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4473 d4fa192b-c00b-0410-8231-f00ffab90ce4