Git commits in Moodle 3.9.7 by David Mudrák

commit f77ec5e7fdf3b00107fed6732b4cf6bdac4f6803
Author: David Mudrák <david@moodle.com>
Date:   Tue, 04 May 2021 19:04:31 +0800
Tag:    v3.9.7

MDL-71425 lang: Fix reworded strings in tests


commit f92e83fe361a9fe3400d7ea666444b800eb278b5
Author: David Mudrák <david@moodle.com>
Date:   Tue, 20 Apr 2021 03:17:56 +0800
Tag:    v3.9.7

MDL-70864 files: Fix zip_packer extracting files with trailing dots


commit 23846c54505a94d2aab89859549619e369fc7e37
Author: David Mudrák <david@moodle.com>
Date:   Tue, 09 Feb 2021 22:29:11 +0800
Tag:    v3.9.7

MDL-70804 mnet: Use proper DML method to get records from the table