only send socket lag when logged in

ui/site/src/main.js

@@ -121,7 +121,8 @@ lichess.topMenuIntent = function() {
     params: {},
     options: {
       name: "site",
-      lagTag: null
+      lagTag: null,
+      isAuth: !!$('body').data('user')
     }
   });
 

ui/site/src/socket.js

@@ -140,7 +140,7 @@ lichess.StrongSocket = function(url, version, settings) {
   };
 
   var pingData = function(forceVersion) {
-    var sendLag = pongCount % 8 === 2;
+    var sendLag = options.isAuth && pongCount % 8 === 2;
     if (!versioned || !(forceVersion || sendLag)) return null;
     var data = {
       t: "p"