Always reconnect the socket except when there is an error

Turns out we can get ABNORMAL_CODE (1006) for disconnects where (for
instance) we pause the background page too long. However, in these cases
there is no preceeding ErrorEvent. In contrast, when we have bad
authentication credentials, there is an ErrorEvent. Thus, this change
ensures that we only reconnect if there was no Error.

js/libtextsecure.js

@@ -15915,6 +15915,7 @@ window.axolotl.sessions = {
             onerror   : function() {},
             getStatus : function() { return socket.readyState; }
         };
+        var error;
 
         function resetKeepAliveTimer() {
             clearTimeout(keepAliveTimer);
@@ -15933,16 +15934,19 @@ window.axolotl.sessions = {
         };
 
         function onclose(e) {
-            if (e.code === 1000) { // CLOSE_NORMAL
+            if (!error) {
                 reconnectSemaphore--;
                 setTimeout(connect, reconnectTimeout);
-            } else {
+            }
+            if (e !== 1000 ) { // CLOSE_NORMAL
                 console.log('websocket closed', e.code);
             }
             socketWrapper.onclose(e);
         };
 
         function onerror(e) {
+            error = e;
+            console.log('websocket error');
             socketWrapper.onerror(e);
         };