chg: Select unusable relays too for find, count, outcfg
commands. To find unusable relays, the RelayFingerprint is converted (if possible) to RsaIdentity. In the case that any unusable relay is found, it's printed, but the output isn't fomatted in the same way as the usable relays, since it wouldn't have a microdescriptor.
Closes #34 (closed)