Further revamp the CLI handling in the cacher process, making it

Further revamp the CLI handling in the cacher process, making it
possible for various modules to add cli functions so they can
be manipulated on the fly.

CLI_AddFuncs() registers a set of CLI functions.  We operate
with three lists: the ones not shown in "help" because the
manager already showed them, the normal ones and the debug
commands which are also not shown in a plain "help".

Move the registration of cli functions out to the code they
belong in: VCL, BAN and VCA.

Give VCA a real Init function, and have the cli function ("start")
initiate the acceptor thread which listens for incoming connections.

Split CLI_Init() into CLI_Init() and CLI_Run()

git-svn-id: svn+ssh://projects.linpro.no/svn/varnish/trunk@2598 d4fa192b-c00b-0410-8231-f00ffab90ce4