Comment 6 for bug 966963

Uh, *wow*, that works as advertised. Rescan speed is about 3-4 seconds (used to be a few minutes).

The only thing I notice is that before, even if the scan was canceled we would mark the directories as verified (because that marking was occurring as the scan proceeds). Now, we only mark things as verified if the scan finishes cleanly. Is this an ok change?