- Refactored the avdump helper to use generated regexes and
  compound collections.

- Fixed the avdump mismatched files actions to queue commands again,
  instead of starting a new shared session outside the queue _every
  time_.

- Removed the remains of the "CommandID" from the old queue system
  from the avdump helper. (This is a breaking change for plugins using
  the command id, which assume are **none**, but now you've been
  warned. Also, the abstraction version have been bumbed.)

- Hooked the priority query parameter back up for the v3 avdump file
  endpoint.