Added some indices to database and more SQL simplification

about.php

@@ -1,43 +1,16 @@
 <?php
-	/*****************************************************************************
-	IP Reg, a PHP/MySQL IPAM tool
-	Copyright (C) 2007-2009 Wietse Warendorff
-	
-	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.
-	
-	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, see <http://www.gnu.org/licenses/>.
-	
-	For more information, visit http://sourceforge.net/projects/ipreg,
-	or contact me at wietsew@users.sourceforge.net
-	*****************************************************************************/
-	
-	// start page
-		// includes
-		include("includes.php");
-		
-		// start output
-		include("header.php");
-		
-		// set language variables
-		$smarty->assign($lang);
-	
-	// setup page
-		// set vars
-		$smarty->assign("config_version", $config_version);
+/*****************************************************************************
+IP Reg, a PHP/MySQL IPAM tool
+Copyright (C) 2007-2009 Wietse Warendorff (up to v0.5)
+Copyright (C) 2011-2023 Thomas Hooge
 
-	// end page
-		// output
-		$smarty->display("about.tpl");
+SPDX-License-Identifier: GPL-3.0-or-later
+*****************************************************************************/
+	
+include("includes.php");
+include("header.php");
 		
-		// end output
-		include("footer.php");
+$smarty->display("about.tpl");
+
+include("footer.php");
 ?>