Revert "去除老的_YOHOUID、_YOHOTOKEN先关逻辑"

This reverts commit 5b299241.

@@ -4,6 +4,15 @@ const config = global.yoho.config;
 
 module.exports = () => {
     return (req, res, next) => {
+        const uid = req.cookies._YOHOUID;
+        const token = req.cookies._YOHOTOKEN;
+        const key = `-_-!!!${uid}!!!-_-`;
+
+        if (md5(key) === token) {
+            req.user.uid = uid;
+            delete req.cookies._YOHOUID;
+        }
+
         // app 内处理
         if (req.yoho.isApp) {
             if (req.cookies.app_uid &&