+=item publicinbox.cgitrc
+
+A path to a L<cgitrc(5)> file. "repo.url" directives in the cgitrc
+will be mapped to the nickname of a coderepo (without trailing slash),
+and "repo.path" directives map to "coderepo.<nick>.dir".
+Use of this directive allows admins of existing cgit installations
+to skip declaring coderepo sections and map inboxes directly to
+code repositories known to cgit.
+
+Macro expansion (e.g. C<$HTTP_HOST>) is not yet supported.
+
+=item publicinbox.cgitbin
+
+A path to the C<cgit.cgi> executable. The L<PublicInbox::WWW>
+interface can spawn cgit as a fallback if the publicinbox.cgitrc
+directive is configured.
+
+Default: /var/www/htdocs/cgit/cgit.cgi or /usr/lib/cgit/cgit.cgi
+
+=item publicinbox.cgitdata
+
+A path to the data directory used by cgit for storing static files.
+Typically guessed based the location of C<cgit.cgi> (from
+C<publicinbox.cgitbin>, but may be overridden.
+
+Default: basename of C<publicinbox.cgitbin>, /var/www/htdocs/cgit/
+or /usr/share/cgit/
+
+=item publicinbox.mailEditor
+
+See L<public-inbox-edit(1)>
+
+=item publicinbox.indexMaxSize
+=item publicinbox.indexBatchSize
+=item publicinbox.indexSequentialShard
+
+See L<public-inbox-index(1)>
+
+=item publicinbox.wwwlisting
+
+Enable a HTML listing style when the root path of the URL '/' is accessed.
+Valid values are:
+
+=over 8
+
+=item * all
+- Show all inboxes
+
+=item * 404
+- Return a 404 page. This is useful to allow customization with
+L<Plack::App::Cascade(3pm)>
+
+=item * match=domain
+- Only show inboxes with URLs which belong to the domain of the HTTP request
+
+=for TODO comment
+
+support showing cgit listing
+
+=back
+
+Default: C<404>
+
+=item publicinbox.grokmanifest
+
+Controls the generation of a grokmirror-compatible gzipped JSON file
+at the top-level of the PSGI interface. You generally do not need to
+change this from the default.
+
+Valid values are:
+
+=over 8
+
+=item * match=domain
+- Only include inboxes with URLs which belong to the domain of
+the HTTP request. This is compatible with virtual hosting where
+several domains come from the same host.
+
+=item * all
+- All inboxes are present in C<manifest.js.gz>, regardless of domain.
+Only use this if you're serving HTTP requests in a domain-agnostic manner.
+
+=item * 404
+- C<manifest.js.gz> will only contain an empty JSON array.
+This does NOT affect C<$INBOX_URL/manifest.js.gz>, which will
+always contain all git repos used by the inbox at C<$INBOX_URL>
+
+=back
+
+Default: C<match=domain>
+