Reconnect when token changes on successful connection

If the websocket connection succeeds, but the token is wrong, changing
the token in the UI did not succeed (because we are already connected
and nothing was triggering a reconnect attempt with the new config).

js/services/rpc/rpc.js

@@ -122,6 +122,7 @@ function(syscall, globalTimeout, alerts, utils, rootScope, uri, authconf, filter
         });
 
         if (failed) {
+          needNewConnection = true;
           alerts.addAlert('<strong>Oh Snap!</strong> Authentication failed while connecting to Aria2 RPC server. Will retry in 10 secs. You might want to confirm your authentication details  by going to Settings > Connection Settings', 'error');
           timeout = setTimeout(update, globalTimeout);
           return;