Overview changes

[Katsuhiro Kondou]

In article <72lm556tbs.fsf at demon.net>,
	Alex Kiernan <alexk at demon.net> wrote;

} For other overview methods based on databases clearly you could add
} another index, for buffindexed, I don't know.

As to buffindexed, all overview indices that includes
information of overview data, like where overview data
actually located etc, are examined in any case to see
if duplicated.  So, I think it's meaningless to
consider searching by time index for buffindexed.
-- 
Katsuhiro Kondou