Git commits in Moodle 2.8.3 by Russell Smith

commit 6e8d598cff1121605c88dc3768696cbb06a5377b
Author: Russell Smith <mr-russ@smith2001.net>
Date:   Thu, 12 Dec 2013 00:33:20 +0800
Tag:    v2.8.3

MDL-43421 logging: Ignore race condition in access update.