- 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
initial import of acs kernel data-model ported to postgresql - implementation of tree queries completed for acs_object_types. Still need to finish tree queries for acs_privilege_hierarchy and rel_constraints tables.