DLINE [duration] <ip> :[reason] [| oper reason]

Adds a DLINE to the database which will deny any
connections from the IP address of the banned client.
The banned client will receive a message saying
they are banned with reason [reason].

Duration is optional, and is in minutes. If specified,
the DLINE will not be saved in the database.

If an oper reason is added (the pipe must be specified
to seperate the fields) this will be added into the
database but will not be shown to the user when they
are given the kline reason.

DLINE [duration] <ip> ON irc.server :[reason] [| oper reason]
will dline the user on irc.server if irc.server accepts
remote dlines. irc.server can contain wildcards.

- Requires Oper Priv: oper:kline
