Git commits in Moodle 2.6.5 by John Okely

commit 803d739f4ab5d8fc970d0c744ae602f5d9d717cd
Author: John Okely <john@moodle.com>
Date:   Thu, 17 Jul 2014 16:42:42 +0800
Tag:    v2.6.5

MDL-45339 Libraries: Add a note to docblock of get_config, set_config, and unset_config to note they are used in lib/db/upgrade.php