[project @ 2005-04-12 09:04:23 by simonmar]
Per-task nurseries for SMP. This was kind-of implemented before, but it's much cleaner now. There is now one *step* per capability, so we have somewhere to hang the block count. So for SMP, there are simply multiple instances of generation 0 step 0. The rNursery entry in the register table now points to the step rather than the head block of the nurersy.