TyrantConquestPoll: Ensure config.keys == defaults.keys
TyrantConquestPoll: Ensure config.keys == defaults.keys

Otherwise, a channel config containing only one key will result in users
being unable to set any other valid news items.
In addition, a channel config containing a bunch of garbage keys will
pollute the config, and show up in !tilenews list

petertseng/cinch-tyrant,petertseng/cinch-tyrant