Git commits in Moodle 2.9.3 by Johannes Burk

commit 208f6dfce06bb8a052de46a7c78f8d834f2540f5
Author: Johannes Burk <me@jojoob.de>
Date:   Thu, 25 Jun 2015 22:45:51 +0800
Tag:    v2.9.3

MDL-49750 mod_data: fix updating file/picture fields breaks references