+B<--privoxy-cgi-prefix privoxy-cgi-prefix> The prefix to use when
+building URLs that are supposed to reach Privoxy's CGI interface.
+If it's not set, B<http://p.p/> is used, which is supposed to work
+with the default Privoxy configuration.
+If Privoxy has been built with B<FEATURE_HTTPS_INSPECTION> enabled,
+and if https inspection is activated with the B<+https-inspection>
+action, this option can be used with
+B<https://p.p/> provided the system running Privoxy-Regression-Test
+has been configured to trust the certificate used by Privoxy.
+Note that there are currently two tests in the official
+B<regression-tests.action> file that are expected to fail when
+using a B<privoxy-cgi-prefix> with B<https://> and aren't automatically
+skipped.
+