Git commits in Moodle 2.0.6 by Tony Levi

commit 165e476948e66ff345b33a0c0000edfc9dc12494
Author: Tony Levi <tony.levi@netspot.com.au>
Date:   Thu, 16 Jun 2011 11:17:17 +0800
Tag:    v2.0.6

MDL-24577: Fix mark all posts in this discussion read doesn't work completely correct