Update sonicwall.inc.php

Updated to conform to coding standards, added copyleft header.

includes/discovery/mempools/sonicwall.inc.php

@@ -1,4 +1,14 @@
 <?php
+/*
+ * LibreNMS SonicWALL CPU information module
+ *
+ * Copyright (c) 2015 Mark Nagel <mnagel@willingminds.com>
+ * 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 3 of the License, or (at your
+ * option) any later version.  Please see LICENSE.txt at the top level of
+ * the source code distribution for details.
+ */
 
 if ($device['os'] == 'sonicwall') {
       echo 'SonicWALL-MEMORY-POOL: ';