2.- Prevent users from deleting system generators and modifying any entry in rdb$generators. VIO passes the task to DFW, the only problem being that the user gets the error when a commit is done, not before.
2.- style
3.- Try to fix the mess caused by different data types used to represent bifields of SCL_ constants defined in scl.h,
first round. No circular dependencies found through MSVC. Still pending dyn* and grant.epp files.
