which point to the objects.

Preallocate objcore with obj+objhead before we enter locked
hash sections.

Rename objcore.list to objcore.lru_list.

Eliminate obj.list and objhead.hashlen



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3756 d4fa192b-c00b-0410-8231-f00ffab90ce4