Simplify the initial connection protocol.

The ServerConnection.connect method is no longer async,
we rely on the onconnected callback only.  The onconnected
callback is now only called after the initial handshake
completes.  There is a new onerror callback.

static/example/example.js

@@ -21,12 +21,12 @@ async function start(url) {
 
     // connect to the server
     if(token) {
-        await serverConnect(status, token);
+        serverConnect(status, token);
     } else if(status.authPortal) {
         window.location.href = groupStatus.authPortal
         return;
     } else {
-        await serverConnect(status, null);
+        serverConnect(status, null);
     }
 }
 
@@ -46,7 +46,7 @@ function displayStatus(status) {
  * @parm {Object} status
  * @parm {string} token
  */
-async function serverConnect(status, token) {
+function serverConnect(status, token) {
     // create the connection to the server
     let conn = new ServerConnection();
     conn.onconnected = async function() {
@@ -66,7 +66,7 @@ async function serverConnect(status, token) {
     conn.onjoined = onJoined;
 
     // connect and wait for the onconnected callback
-    await conn.connect(status.endpoint);
+    conn.connect(status.endpoint);
 }
 
 /**