Okey dokey... this is quite functional at this stage.
Right now we have:
o TCP health checking (socket up/down)
o HTTP OPTIONS checking
o HTTP HEAD checking
o Support for ap_expr against the response of
the backend for OPTIONS/HEAD
o Ability to add a URI to the worker's path for
a "health check" URL (eg: /check/up.php)
o Allow for a set number of successes or failures
before enabling/disabling the worker.
o Some basic balancer-manager view
I plan to add updating the health check params via
the bal-manager UI in a bit.
Oh yeah, docs are in place
(http://httpd.apache.org/docs/trunk/mod/mod_proxy_hcheck.html)