reduce warning.

Base/Messages.h

@@ -6,6 +6,7 @@
 #include <boost/beast/http/string_body.hpp>
 #include <boost/callable_traits/return_type.hpp>
 
+// Signature 参数不能为移动语义
 namespace Older {
 struct NotifyServerChan {
     using Signature = void(const boost::beast::http::request<boost::beast::http::string_body> &);
@@ -16,7 +17,7 @@ using HttpRequest = boost::beast::http::request<boost::beast::http::string_body>
 using RequestHandler = std::function<void(HttpSession &, const HttpRequest &, const boost::urls::matches &)>;
 
 struct RegisterUrlHandler {
-    using Signature = void(std::string_view url, RequestHandler &&handler);
+    using Signature = void(std::string_view url, RequestHandler handler);
 };
 } // namespace Older