The dead are not bogus (Bill & Ted I), they're ghosts (Bill & Ted II)
* terminated machines are skipped, as they were in old ironfan.
* ...except in the case of knife cluster show, which accepts them as there-but-bogus if verbosity > 1.
The DSL has always used 'keypair' not 'key_pair'. The only touchpoints to key_pair were internal.
With a facade in place, there's no reason to go with Fog's opinion over our own DSL's. This patch makes ironfan use 'keypair' uniformly.