Get ice servers via xirsys

Xirsys is used to get working ice servers. A call is made to a script on
the server (which has the necessary xirsys credentials), which in turn
get the data from xirsys and return to client.

js/comm.js

@@ -33,6 +33,28 @@ else{
 window.addEventListener('load', function(){
     //startCounter();//shows the time spent in room
     
+    /*
+    ********************************************************************************************************************************
+    ********************************************************************************************************************************
+    ********************************************************************************************************************************
+    ********************************************************************************************************************************
+    ********************************************************************************************************************************
+    */
+
+    //Get ice servers
+    let xhr = new XMLHttpRequest();
+
+    xhr.onreadystatechange = function(e){
+        if(xhr.readyState == 4 && xhr.status == 200){
+            let res = JSON.parse(xhr.responseText);
+
+            servers = res.iceServers ? res : servers;
+        }
+    }
+
+    xhr.open("GET", "/Server.php", true);
+    xhr.send();
+    
     /*
     ********************************************************************************************************************************
     ********************************************************************************************************************************