+=head1 CONFIGURATION OPTIONS
+
+=over 4
+
+=item B<unsharp>: I<medium>;
+
+Sets the amount of unsharping onis should do. Valid options are I<none>,
+I<light>, I<medium> and I<hard>.
+
+=over 4
+
+=item I<none>
+
+does not do any unsharping.
+
+=item I<light>
+
+Leaves IP-addresses as they are. The deepest subdomains containing numbers have
+those numbers removed. So C<dsl-084-056-107-131.arcor-ip.net> becomes
+C<dsl-*-*-*-*.arcor-ip.net>.
+
+=item I<medium>
+
+Removes the last byte from IP-adresses. So C<84.56.107.131> becomes
+C<84.56.107.*>. Hostnames have the deepest subdomains removed if they contain
+numers, so C<dsl-084-056-107-131.arcor-ip.net> becomes C<*.arcor-ip.net> while
+C<shell.franken.de> is not modified. This is the default and recommended
+behavior.
+
+=item I<hard>
+
+Handles IP-addresses as I<medium>. Hostnames have all subdomains removed, so
+C<p5493EC60.dip.t-dialin.net> becomes C<*.t-dialin.net> and C<shell.franken.de>
+becomes C<*.franken.de>.
+
+=back
+
+=cut
+