UrlProvider: Add pageByTitle()

config.h

@@ -26,6 +26,7 @@ struct ConfigUrls
 	std::string linkallcats;
 	std::string linkshere;
 	std::string linkpage;
+	std::string linkpagebytitle;
 	std::string linkrevision;
 	std::string linkhistory;
 	std::string linkedit;