<para>
Adds a D:line to <filename>dline.conf</filename>, which will deny any connections
from the given IP address.
+ The IP address can be given as a full address (192.168.0.1) or
+ as a CIDR mask (192.168.0.0/24).
</para>
<para>
If the optional parameter <replaceable>length</replaceable> is given, the D:line will