0.8pre.2

0.8pre.2
	Time to slip my PCL changes in under cover of CSR's patch landing:

	Apply patch from Gerd Moellmann to remove cacheing of GF
        caches.  This makes lots of WITHOUT-INTERRUPTSs in PCL code
        go away - a bonus for threading

          http://entomotomy.cliki.net/pcl-gf-cache-cacheing-not-needed

        Replaced remaining (two) WITHOUT-INTERRUPTSs with WITH-PCL-LOCK
        - a new macro that spinlocks around the approriate section.
	On unithread SBCL it actually does nothing at all, which I'm
	not sure about - we're assuming that WITHOUT-INTERRUPTS has been
	used as a substitute for WITHOUT-SCHEDULING.  This is likely
	but not certain