Prepare 6.0 dev

htdocs/install/check.php

@@ -411,7 +411,8 @@ else
 								array('from'=>'3.7.0', 'to'=>'3.8.0'),
 		                        array('from'=>'3.8.0', 'to'=>'3.9.0'),
 		                        array('from'=>'3.9.0', 'to'=>'4.0.0'),
-		                        array('from'=>'4.0.0', 'to'=>'5.0.0')
+		                        array('from'=>'4.0.0', 'to'=>'5.0.0'),
+		                        array('from'=>'5.0.0', 'to'=>'6.0.0')
 		);
 
 		$count=0;