* More flexible headers for STOMP messages, theoretically.
* Lower the priority of the base implementation.
* More context.
* Add in the "aud" claim.
... ensure we're dealing with our tokens.
* Rectify the other base class.
* Remove some chaff intro'd from merge conflicts.
* Return after failing to find the "aud" claim.
* Permissively allow without the "aud" claim...
... _could_ roll more conditionally, with some state set during an update
hook; however, seems like unnecessary complexity.
* Couple of coding standards things.
* Add the use of the class back in.
Jared Whiklo