Nomenclature:

A leaf is a check-in with no descendants.
An open leaf is a leaf that does not have a "closed" tag and is thus assumed to still be in use.
A closed leaf has a "closed" tag and is thus assumed to be historical and no longer in active use.

Open leaves:

2009-03-15
22:33:34	*	[299b6f4f43] Leaf Deleting appserver, since it will merged with phpserver (user: crodas, tags: trunk) [timeline]