mode.

two calls where actually necessary to guaranteed get an unused revid between
two used ones.

Removed pointlss module doc string.

fact that it was out of date.

  cache size.

Also updated the format to allow cache files larger than 4G in size.

ZEO, still needs to be removed.

outcome.

to exercise it under more stressful conditions.

versions.

make historical connection cache story a bit more predictable: you set a total number of historical connections, not one per serial.  Also remove "historical future" connections--I should have seen seen/remembered lastTransaction.  Now attempts to create historical future connections raise an error, as they should.

incrementally remove some version support (this time from connection and DB); add support for historical read-only connections.