Currently we store the auto-generated cfpv file in `$(sys.masterdir)` don't we?  Not sure, so the below may be inaccurate.

"When any policy-related file under `$(sys.workdir)/inputs` changes and validates to be syntactically correct, the timestamp in `cf_promises_validated` is updated. If the validation fails, the run of `cf-promises` is skipped.

The `cf-execd`, `cf-serverd` and `cf-monitord` daemons will not reload the policy files unless `cf_promises_validated` has an updated timestamp (which `cf-agent` will normally update as mentioned earlier)."