Add port 80

// FREEBIE

js/background.js

@@ -52,7 +52,7 @@
     });
 
     var SERVER_URL = 'https://textsecure-service-staging.whispersystems.org';
-    var SERVER_PORTS = [4433, 8443];
+    var SERVER_PORTS = [80, 4433, 8443];
     var ATTACHMENT_SERVER_URL = 'https://whispersystems-textsecure-attachments-staging.s3.amazonaws.com';
     var messageReceiver;
     window.getSocketStatus = function() {