In general, these changes were introduced in the same vein of the
changes to controller `startListeners`.
Specifically, these changes also decouple the Controller and the Worker
shutdown processes. Currently, a call to `stopListeners` on an instance
that is running as both a Controller and a Worker would stop the
listeners for both.
Lastly, we also add unit/integration tests to the shutdown code.
* Sessions support for read:self and cancel:self permissions. This is automatic with fallback; no API change is needed.
* Strips out values from listing if only self actions are allowed on the resource and the user ID is different. This prevents a default ACL of id=*;type=session;actions=read:self,cancel:self from causing all values to be visible when listing.
* Adds an unprivileged user to development/testing instances. This user has only default permissions plus the ability to authorize sessions in the default target.
Hugo Vieira
Jeff Mitchell
Jim