Git commits in Moodle 3.6.7 by Marina Glancy

commit 1d7543be8ced40f118131ad60ca14cbc3f80ff4f
Author: Marina Glancy <marina@moodle.com>
Date:   Mon, 04 Nov 2019 21:37:46 +0800
Tag:    v3.6.7

MDL-67084 core_form: duration element should export arrays


commit e6993ed682587b544767b937fd682d9bad3249c4
Author: Marina Glancy <marina@moodle.com>
Date:   Thu, 31 Oct 2019 02:04:32 +0800
Tag:    v3.6.7

MDL-67088 mod_assign: compare time without case for MacOS compat


commit 48d8fb92ff432022b9b3403e3b713ae3c1bcf616
Author: Marina Glancy <marina@moodle.com>
Date:   Sat, 20 Jul 2019 23:02:56 +0800
Tag:    v3.6.7

MDL-66197 core: correct get parent language