Round-Robin SQL

Release Notes: A throttling system that limits the amount of data to process when trying to catch up has been added. Hard limits on the maximum amount of data to process at once have been added. A version table has been added to track the schema/code version.

Release Notes: update() was changed to SECURITY DEFINER and grants on things that no longer needed them were removed. Schema references were added to several places. A bug in max_end_time_to_delete was fixed. Previously, it would not consider the requirements children had of their parents. The second call to update_locks() in update() was completely broken. A crude update mechanism was added.

Release Notes: This version will make use of contrib/user_lock if present. If it detects that userlock is installed, it will use it to ensure that only one copy of update() will run at any given time.

No changes have been submitted for this release.