+ When calling an update, the DDNS client automatically checks
+ if this update is required by testing whether the hostname points
+ to the current public IP address.
+ Therefore it is not guaranteed than an update is performed.
+ </para>
+
+ <para>
+ The <option>--force</option> switch can be used to skip that
+ check and perform an update. Please note that some providers
+ may block your account if unnecessary updates are repeatedly
+ performed.