UNKLINE <user@host>

Will attempt to unkline the given <user@host>
If the kline is conf based, the kline will not be removed.

UNKLINE <user@host> ON irc.server

Will unkline the user on irc.server if irc.server accepts
remote unklines. If the kline is conf based, the kline will
not be removed.

- Requires Oper Priv: unkline