Git commits in Moodle 3.11.7 by Cameron Ball

commit 869c717e7295c053da1134fa9cc50a0eb33374ed
Author: Cameron Ball <cameronball@catalyst-au.net>
Date:   Thu, 28 Apr 2022 15:08:48 +0800
Tag:    v3.11.7

MDL-74441 mod_forum: Fix overflow in unified grader


commit 705e6c5614f37c19dd210afa8b82c98243ce9289
Author: Cameron Ball <cameronball@catalyst-au.net>
Date:   Wed, 06 Apr 2022 14:42:10 +0800
Tag:    v3.11.7

MDL-74438 cache: Check if cached value is boolean false