current time, the latter returns the number of seconds since an object
was last requested.  The exact semantics of both are slightly fluid at
the moment, and will be revisited at a later date.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1628 d4fa192b-c00b-0410-8231-f00ffab90ce4