Git commits in Moodle 3.9.3 by Brendan Heywood

commit cedf141cc36b3161e6d135b70ac5559c832224b0
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Mon, 12 Oct 2020 12:59:31 +0800
Tag:    v3.9.3

MDL-68983 cache: Fix bug with readonly session combined with lock debug


commit c4a87875741903ac923106de14eb3501e3b5ebbd
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Sat, 10 Oct 2020 16:24:38 +0800
Tag:    v3.9.3

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


commit 2e5daf91088104ed0b4f757153a558002fc5490f
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Thu, 24 Sep 2020 15:01:31 +0800
Tag:    v3.9.3

MDL-68292 core: Remove sesskey leakage on module pages


commit 348e338a21f668c84c7cf6e7997588d8077cc040
Author: Brendan Heywood <brendan@catalyst-au.net>
Date:   Tue, 18 Feb 2020 20:42:58 +0800
Tag:    v3.9.3

MDL-67650 admin: Consistently show forced config settings