Git commits in Moodle 3.3.1 by Adam Olley

commit 57cb067173b0b9c289431e2d04fe302d4f60ba8f
Author: Adam Olley <adam.olley@blackboard.com>
Date:   Thu, 20 Apr 2017 10:11:59 +0800
Tag:    v3.3.1

MDL-58651 logstore_database: Add ability to not send database options