Special Case Test Systems

Two abilities of special case test systems that are not intended for normal use are the following:

The ability to execute r11 with CXX Version 12, with exceptions.
The ability to change the format of individual databases so that some are FORMAT 1, which can be accessed by r11 and Version 12 and subject to easy fallback while other databases are FORMAT 2, which are intended for Version 12 only and cannot be accessed by r11 and have an exception during fallback.