have a <sys/queue.h> that differs in small but important details from what
we expect.  Replace our "queue.h" (which was taken from NetBSD) with a new
"vqueue.h" which is based on FreeBSD's <sys/queue.h> with the debugging
taken out and a "V" prefix added to everything.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@2033 d4fa192b-c00b-0410-8231-f00ffab90ce4