- Patch #174226 by keith.smith, pwolanin et al al -- and greatly simplified by me: added a copyright notice.

COPYRIGHT.txt

@@ -0,0 +1,25 @@
+// $Id$
+
+All Drupal code is Copyright 2001 - 2008 by the original authors.
+ 
+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.
+ 
+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 as the file LICENSE.txt; if not, please see
+http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+ 
+Drupal is a registered trademark of Dries Buytaert.
+
+Drupal includes works under other copyright notices and distributed
+according to the terms of the GNU General Public License or a compatible
+license, including:
+
+  jQuery - Copyright (c) 2007 John Resig
+

index.php

@@ -7,6 +7,9 @@
  *
  * The routines here dispatch control to the appropriate handler, which then
  * prints the appropriate page.
+ *
+ * All Drupal code is released under the GNU General Public License.
+ * See COPYRIGHT.txt and LICENSE.txt.
  */
 
 require_once './includes/bootstrap.inc';