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

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

DLINE [duration] <ip> ON <irc.server> :[reason] [| oper reason]

Will DLINE the user on matching irc.servers that accept a
remote DLINE. irc.server can contain wildcards.

- Requires Oper Priv: oper:kline
