Move logics to create forum notification type to tcl to:
- reduce code duplication - make it simpler to extend forums with new notification types
This reform was triggered by a downstream request, where users would like a new kind of notification for forum moderators that triggers also when a forum message has not been approved
Oracle9i porting changes - Changed procedure names from delete to del - Changed view declaration to use actual column names - Changed "rel_constraints_violated_one" and "rel_constraints_violated_two" (http://openacs.org/forums/message-view?message_id=81045)