bug\patch: overlays for a single subfolder never showed
From: Gunnar Dalsnes <hardon_at_online.no>
Date: Thu, 27 Aug 2009 17:45:48 -0700 (PDT)
If you have a single subfolder\WC, overlay for that folder would never show because overlay handler cached status for that path until a new path comes along (but it never did when you have only one folder). Changed the cache logic to cache max count of overlay handlers(-1) times -> UpdateShell and F5 works.
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