Git commits in Moodle 3.2.4 by Adrian Greeve

commit f751b97393f5ed734dc11aea5451bf7622d5bb71
Author: Adrian Greeve <adrian@moodle.com>
Date:   Mon, 12 Jun 2017 12:02:08 +0800
Tag:    v3.2.4

MDL-58729 database: Improve performance of CLI tool.