UNDLINE <IP address>

Will attempt to undline the given <IP address>
If the dline is conf based, the dline will not be removed.

UNDLINE <IP address> ON irc.server

Will undline the given <IP address> on irc.server if irc.server accepts
remote undlines. If the dline is conf based, the dline will
not be removed.

- Requires Oper Priv: undline