added closedwiki option

This hides most of the wiki tools including the sidebar and search until
the user has logged in.

conf/default.php

@@ -7,3 +7,4 @@
 $conf['sidebar_sections'] = 'h1,h2,h3,h4,h5';
 $conf['header_layout'] = 'header-default';
 $conf['autocollapse'] = 1;
+$conf['closedwiki'] = 0;

conf/metadata.php

@@ -19,3 +19,4 @@ $meta['header_layout'] = array(
                         );
 
 $meta['autocollapse'] = array('onoff');
+$meta['closedwiki'] = array('onoff');