make html <title></title> configurable

handlers/handler.cpp

@@ -44,9 +44,11 @@ Response Handler::errorResponse(std::string errortitle, std::string errormessage
 	return { status, error.render()};
 }
 
-std::string Handler::createPageTitle(std::string append)
+std::string Handler::createPageTitle(std::string title)
 {
-	return this->handlersConfig->wikiname + " - " + append; //TODO: we might wanna make the format configurable
+	Varreplacer replacer("{");
+	replacer.addKeyValue("title", title);
+	return replacer.parse(this->handlersConfig->page_title_template);
 }
 
 QueryOption Handler::queryOption(const Request &r) const