OpenACS

There seems to be a bug in "db_driverkey", when OpenACS connects to

multiple databases [1]. The situation with "db_driverkey" is

complicated by the fact that this function is sometimes called with a

database name in its argument "dbn", and sometimes with a database

handle. This is something to look at in the future.

The new version removes the per-thread caching, which was introduced

to reduce the high number of mutex locks caused in busy machines. The

new version is better by a factor of 2 than older versions, but relies

on NaviServer.

[1] https://openacs.org/forums/message-view?message_id=5537865

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