Git commits in Moodle 3.10.0 by Justin Hunt

commit f9f0f1cc2623c043797a0e7e77f2687faf59f245
Author: Justin Hunt <poodllsupport@gmail.com>
Date:   Tue, 01 Oct 2019 14:40:04 +0800
Tag:    v3.10.0-beta

MDL-66810 mod_lti: Reinstate deprecated default permissions on iframe