- Part 4 of OpenACS 5.9 agenda: get rid of tree_sortkey in acs-objects ; to be on the safe side, backup your database before upgrading, since the acs-objects.treesortkey is being removed (custom packages might erroneously depend on it)
- add stored procedure sec_session_property__upsert to address concurrency problems with updates in sec_session_properties; implementation for PostgreSQL and Oracle are added, latter is not tested. - bump version number to 5.9.0d4