darwin-updates-20040613

darwin-updates-20040613

complain if TryReclaim gets a vnode which is on the inactive list

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This delta was composed from multiple commits as part of the CVS->Git migration.
The checkin message with each commit was inconsistent.
The following are the additional commit messages.
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be willing to instantiate a ubc in our lookup vop (rename needs this so
the followup vget doesn't get a vnode with no ubc)

refuse to instantiate a ubc if VORECLAIM is set

rework rename 2 links to same vnode case. (yes, you can have hard links in AFS)

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drop the parent directory ref and remove name from the kernel name cache
when recycling a vnode.