minor update and add doc on on_name_lost()

              const gchar     *name,

              gpointer         user_data)

{

	g_message ("on_name_lost() name=%s", name);

	AppData *appdata = (AppData*) user_data;

	/* this won't happen if this is the only app that tries to take the

	 * name, because GApplication already have primary instance

	 * concept. None primary instance will just send 'activate' signal to

	 * primary instance and exit. They will not try to register ibus at

	 * all. */

	g_message ("on_name_lost() name=%s exiting", name);

	g_application_quit (G_APPLICATION (appdata->app));

}

static void