Git commits in Moodle 3.9.x by Dan Marsden

commit 4727970abd79bbaafb1de35dce1b617f3270a2de
Author: Dan Marsden <dan@danmarsden.com>
Date:   Fri, 03 Jul 2020 07:23:17 +0800
Tag:    v3.9.3

MDL-69641 grade: fix slow query.

commit fe96a5528cbe4922d9ec93a6a77ed96cc790a9a3
Author: Dan Marsden <dan@danmarsden.com>
Date:   Wed, 29 Apr 2020 04:19:40 +0800
Tag:    v3.9.0-beta

MDL-68054 lib: viewhiddenactivities should be set as captype:read

commit a542fe35b50af9851a460ed2d2ead071ddf1ef12
Author: Dan Marsden <dan@danmarsden.com>
Date:   Wed, 29 Apr 2020 04:11:17 +0800
Tag:    v3.9.0-beta

MDL-67497 lib: backuptargetimport should be set as captype:read

commit c61619fd1ffb7cae676812034a49989a96290266
Author: Dan Marsden <dan@danmarsden.com>
Date:   Fri, 07 Feb 2020 05:57:24 +0800
Tag:    v3.9.0-beta

MDL-67872 lib: fix code compliance with guidelines.

commit de8d91ce3848970b7506fc8ab3eb2143ca9e0ac5
Author: Dan Marsden <dan@danmarsden.com>
Date:   Fri, 07 Feb 2020 05:54:00 +0800
Tag:    v3.9.0-beta

MDL-67872 lib: correct plagiarism config frankenstyle naming.