beautify url recentchanges_link redirs to

This ensures that the same link is reached as is used on pages,
so browsers will know that the link on pages has been visited, and color it
appropriately.

IkiWiki/Plugin/recentchanges.pm

@@ -80,7 +80,7 @@ sub cgi ($) { #{{{
 				"</p>");
 		}
 		else {
-			IkiWiki::redirect($cgi, $config{url}."/".htmlpage($link));
+			IkiWiki::redirect($cgi, $config{url}.IkiWiki::beautify_url("/".htmlpage($link)));
 		}
 
 		exit;