Re: [PATCH] prune: --expire=time

Junio C Hamano [off-list ref] wrote:

	git prune --expire=off

felt a bit confusing to me at the first glance.  Does it turn
off the expiration mechanism, retaining all cruft, or turns off
the mechanism to give grace period for recent objects?  The
answer is obviosuly the latter as "retain all cruft" is
meaningless, but still it somehow feels funny.  It might be
easier to explain if it was:

	git prune --expire=now

Maybe an alternative:

	git prune --retain=1.day
	git prune --retain=off

perhaps?  I dunno.

Perhaps we could also use 'none' or 'all, e.g. --retain=none or
--expire=all.