Git commits in Moodle 3.9.x by Andrew Madden

commit 41121d705f5da53d7f05a243941c95dac29c5735
Author: Andrew Madden <andrewmadden@catalyst-au.net>
Date:   Mon, 19 Oct 2020 11:35:19 +0800
Tag:    v3.9.3

MDL-67695 mod_lti: Use correct return structure for get_tool_proxies.

commit 79f621241c8a5789ea8590d96272e07d06821d2e
Author: Andrew Madden <andrewmadden@catalyst-au.net>
Date:   Thu, 27 Feb 2020 09:01:54 +0800
Tag:    v3.9.0-beta

MDL-67850 quizaccess: add Safe Exam Browser access rule plugin

commit 3df849213254c289faef8d1966dbf74de21850f1
Author: Andrew Madden <andrewmadden@catalyst-au.net>
Date:   Thu, 27 Feb 2020 08:55:31 +0800
Tag:    v3.9.0-beta

MDL-67850 lib: add new plist library