Git commits in Moodle 3.8.6 by Brendan Heywood

commit 0df4a06a97cb568973e5c5ff3d0b97bc5dc6dbc2
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Sat, 10 Oct 2020 16:24:38 +0800
Tag:    v3.8.6

MDL-69910 calendar: Fix export exception when both params are sent

commit e2558ec3963c41aca5a5a6c61432c30d383c7823
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Thu, 24 Sep 2020 15:01:31 +0800
Tag:    v3.8.6

MDL-68292 core: Remove sesskey leakage on module pages

commit 251803de9491b244b820aca3ea202a6ad421f126
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Tue, 18 Feb 2020 20:42:58 +0800
Tag:    v3.8.6

MDL-67650 admin: Consistently show forced config settings