Modules\Module: provide a lighter header sample

We should get rid of the current way of copying license snippets to
every single file. This is a first example of how a lighter header
could look like. I'd add a short slogan to the title and place a
copy of the license to icinga.org, so our links could point there
instead of gnu.org.

refs #6309

library/Icinga/Application/Modules/Module.php

@@ -1,32 +1,12 @@
 <?php
-// {{{ICINGA_LICENSE_HEADER}}}
-/**
- * This file is part of Icinga Web 2.
- *
- * Icinga Web 2 - Head for multiple monitoring backends.
- * Copyright (C) 2013 Icinga Development Team
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- *
- * @copyright  2013 Icinga Development Team <info@icinga.org>
- * @license    http://www.gnu.org/licenses/gpl-2.0.txt GPL, version 2
- * @author     Icinga Development Team <info@icinga.org>
- *
- */
-// {{{ICINGA_LICENSE_HEADER}}}
 
+/**
+ * Icingaweb 2
+ *
+ * @link https://git.icinga.org/icingaweb2.git/ for the official source repository
+ * @copyright Copyright (c) 2013-2014 Icinga Development Team (https://www.icinga.org)
+ * @license http://www.gnu.org/licenses/gpl-2.0.txt GPL, version 2
+ */
 namespace Icinga\Application\Modules;
 
 use Exception;