Git commits in Moodle 3.7.5 by Mikhail Golenkov

commit 4be61487858ce50da6a58aa6afcfe91330d54240
Author: Mikhail Golenkov <mikhailgolenkov@catalyst-au.net>
Date:   Mon, 17 Feb 2020 11:54:08 +0800
Tag:    v3.7.5

MDL-67980 tasks: Sort ad-hoc tasks by nextruntime.


commit 198b653bf77235fe4cca7eee0daafc833be17ba8
Author: Mikhail Golenkov <mikhailgolenkov@catalyst-au.net>
Date:   Tue, 21 Jan 2020 13:02:30 +0800
Tag:    v3.7.5

MDL-67746 Tasks: Cleanup task logs in chunks.