config: use Jitsi's STUN servers by default, instead of Google's

config.js

@@ -344,9 +344,7 @@ var config = {
         stunServers: [
 
             // { urls: 'stun:jitsi-meet.example.com:443' },
-            { urls: 'stun:stun.l.google.com:19302' },
-            { urls: 'stun:stun1.l.google.com:19302' },
-            { urls: 'stun:stun2.l.google.com:19302' }
+            { urls: 'stun:meet-jit-si-turnrelay.jitsi.net:443' }
         ],
 
         // Sets the ICE transport policy for the p2p connection. At the time