Remove half-completed keysets if any are found. [Bug 13]
Remove half-completed keysets if any are found. [Bug 13]

If, because of a bug or an inopportune crash, a keyset is half
generated, the old code would fail gracelessly upon trying to load the
serverdesc [Bug 13].  This should fix that: if a keyset isn't valid, we
remove it.

reezer/mixminion,reezer/mixminion,crooks/mixminion,nmathewson/mixminion,nmathewson/mixminion,Javex/mixminion,reezer/mixminion,mixminion/mixminion,rxcomm/mixminion,mixminion/mixminion,Javex/mixminion,crooks/mixminion,Javex/mixminion,reezer/mixminion,mixminion/mixminion,nmathewson/mixminion,rxcomm/mixminion,crooks/mixminion,rxcomm/mixminion,mixminion/mixminion,nmathewson/mixminion,Javex/mixminion,rxcomm/mixminion,crooks/mixminion