I have tried using this manually, and adding a rule that sets the watch-port to be CONTROLLER, but this does not seem to work when I try it. The purpose of this will be to redirect rules if connection to a controller is down.
Is anyone aware of whether this should work, or there are plans of making this feature? I have not found anything personally.
You cannot do this. A watch-port needs to be the number of one of the switch's ports.