Pat to ask Michael for use cases showing what's the benefit of adding these 
messages.

I do not believe there is a case where a CAPWAP AP would reboot out of its own 
will, without the AC knowing, unless it is a fatal error. If there is a fatal 
error on the AP, it is unlikely that the AP would be able to send a message to 
the AC. Further, if the AC wants to reset, it could send a reset AP to all of 
its connected APs.