STP_START is the initial setup of a viable workerthread:  Dissecting
HTTP, getting vcl reference etc.

STP_RECV is invoking vcl_recv() and following orders.



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2168 d4fa192b-c00b-0410-8231-f00ffab90ce4