one stevedore to the next.  The LRU code is invoked as soon as any of the
stevedores fills up.

This algorithm is far from ideal, and will not work well with differently
sized stevedores, but it has the advantage of being simple and lock-free.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1734 d4fa192b-c00b-0410-8231-f00ffab90ce4