Git commits in Moodle 3.9.0 by Adam Eijdenberg

commit 1c3b89b1705b61580267c414f622e075ad35e486
Author: Adam Eijdenberg <adam@continusec.com>
Date:   Tue, 30 Jul 2019 14:58:00 +0800
Tag:    v3.9.0-beta

MDL-58018 core: Add support to open sessions without a lock

commit 82da35fd516c72e9b1ed0779051babab1faaa7e2
Author: Adam Eijdenberg <adam@continusec.com>
Date:   Tue, 28 Feb 2017 10:21:58 +0800
Tag:    v3.9.0-beta

MDL-58018 core: Enable read-only sessions for key pages