Don't overwrite configs when loading

inc/functions.php

@@ -9,8 +9,10 @@
 			require 'instance-config.php';
 		}
 		
+		if(!isset($config['post_url']))
 			$config['post_url']		= $config['root'] . $config['file_post'];
 		
+		if(!isset($config['url_match']))
 			$config['url_match'] = '/^' .
 				(preg_match($config['url_regex'], $config['root']) ? '' :
 					(@$_SERVER['HTTPS']?'https':'http') .
@@ -29,11 +31,16 @@
 					'\?\/.+' .
 				')$/i';
 		
+		if(!isset($config['dir']['static']))
 			$config['dir']['static']	= $config['root'] . 'static/';
 		
+		if(!isset($config['image_sticky']))
 			$config['image_sticky']		= $config['dir']['static'] . 'sticky.gif';
+		if(!isset($config['image_locked']))
 			$config['image_locked']		= $config['dir']['static'] . 'locked.gif';
+		if(!isset($config['image_deleted']))
 			$config['image_deleted']	= $config['dir']['static'] . 'deleted.png';
+		if(!isset($config['image_zip']))
 			$config['image_zip']		= $config['dir']['static'] . 'zip.png';
 	}