update doc

lib/rule_default.js

@@ -59,7 +59,18 @@ module.exports = {
 
     //[beta]
     //fetch entire traffic data
-    fetchTrafficData: function(id,info){}
+    fetchTrafficData: function(id,info){},
+
+    customMenu:[
+        {
+            name    :"test",
+            handler :function(){}
+        },{
+            name    :"second-test",
+            handler :function(){}
+        }
+    ]
+
 };
 
 function mergeCORSHeader(reqHeader,originHeader){