Update license headers for plugins and includes.

plugins/include/sorting.inc

@@ -1,13 +1,21 @@
-/* Sorting functions.
- *
- * by the AMX Mod X Development Team
- *
- * This file is provided as is (no warranties).
- *
- * All sort functions are based off the qsort() function from the 
- *  C standard library, which uses the Quick Sort algorithm.
- * For more info, see: http://linux.wku.edu/~lamonml/algor/sort/sort.html
- */
+// vim: set ts=4 sw=4 tw=99 noet:
+//
+// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
+// Copyright (C) The AMX Mod X Development Team.
+//
+// This software is licensed under the GNU General Public License, version 3 or higher.
+// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
+//     https://alliedmods.net/amxmodx-license
+
+//
+// Sorting Functions
+//
+
+//
+// All sort functions are based off the qsort() function from the
+//  C standard library, which uses the Quick Sort algorithm.
+// For more info, see: http://linux.wku.edu/~lamonml/algor/sort/sort.html
+//
 
 #if defined _sorting_included
   #endinput