Activate veriexec functionality

Enable debugging mode and increment or set the debug level

Disable debugging mode

Enforce veriexec fingerprinting (and acitvate if not already)

Get current veriexec state

Lock changes to veriexec meta-data store

Load veriexec fingerprint if secure level is not raised (and passes the
checks for VERIEXEC_SIGNED_LOAD)

Load veriexec fingerprints from loader that supports signed manifest
(and thus we can be more lenient about secure level being raised.)
Fingerprints can be loaded if the meta-data store is not locked. Also
securelevel must not have been raised or some fingerprints must have
already been loaded, otherwise it would be dangerous to allow loading.
(Note: this assumes that the fingerprints in the meta-data store at
       least cover the fingerprint loader.)