KLINE [time] <user@host> :[reason]

[time] if present, gives number of minutes for KLINE

Adds a KLINE which will ban the specified user from
using that server. The banned client will receive a
message saying he/she is banned with reason [reason]

KLINE user@ip.ip.ip.ip :[reason]
will kline the user at the unresolved ip.
ip.ip.ip.ip can be in CIDR form i.e. 192.168.0.0/24
or 192.168.0.* (which is converted to CIDR form internally)

For a temporary KLINE, length of kline is given in
minutes as the first parameter [time] i.e.
KLINE 10 <user@host> :cool off for 10 minutes

KLINE <user@host> ON irc.server :[reason]
will kline the user on irc.server if irc.server accepts
remote klines.

- Requires Oper Priv: kline
