Ref T13249. See PHI1115. I initially wanted to make bin/policy unlock --owner <user> H123 work to transfer ownership of a Herald rule, although I'm no longer really sure this makes much sense.

In any case, this makes things a little better and more modern.

I removed the storage table for rule comments. Adding comments to Herald rules doesn't work and probably doesn't make much sense.

Created and edited Herald rules, grepped for all the transaction type constants.