* katie.conf-security: Add Lock dir        * init_pool.sql-security: Add constraints for disembargo table

* katie.py: Move accept() autobuilding support into separate function        (queue_build), and generalise to build different queues        * db_access.py: Add get_or_set_queue_id instead of hardcoding accepted=0        * jennifer: Initial support for enabling embargo handling with the        Dinstall::SecurityQueueHandling option.        * jennifer: Shift common code into remove_from_unchecked and move_to_dir        functions.        * katie.conf-security: Include embargo options        * init_pool.sql-security: Create disembargo table