<varlistentry>
	<term><option>-I</option></term>
	<term><option>--id-prefix</option></term>
	<listitem>
		<para>
            Provide a prefix that the client id will be built from by appending
            the process id of the client. This is useful where the broker is
            using the clientid_prefixes option. Cannot be used at the same time
            as the <option>--id</option> argument.
		</para>
	</listitem>
</varlistentry>
