Git commits in Moodle 3.8.1 by Brendan Heywood

commit 1f5c6c6b7a00a9756eb6e0831cc491185aa136d3
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Thu, 09 Jan 2020 08:04:18 +0800
Tag:    v3.8.1

MDL-67596 cron: Allow runners to ramp up instantly