ht/index: list Header directive

pg-view/ht/index.php

@@ -154,6 +154,8 @@ $sftp_url = 'sftp://' . (defined('DISPLAY_USERNAME') ? DISPLAY_USERNAME : '<u
 		<li><a rel="external help" href="https://httpd.apache.org/docs/current/mod/mod_autoindex.html#headername"><code>HeaderName</code></a></li>
 		<li><a rel="external help" href="https://httpd.apache.org/docs/current/mod/mod_autoindex.html#readmename"><code>ReadmeName</code></a></li>
 		<li><a rel="external help" href="https://httpd.apache.org/docs/current/mod/mod_autoindex.html#indexstylesheet"><code>IndexStyleSheet</code></a></li>
+
+		<li><a rel="external help" href="https://httpd.apache.org/docs/current/mod/mod_headers.html#header"><code>Header</code></a></li>
 	</ul>
 </section>