Git commits in Moodle 3.5.16 by Sam Hemelryk

commit 9b983fb849798ba5af16cf6ccb29ad5ada1b8a71
Author: Sam Hemelryk <sam.hemelryk@totaralearning.com>
Date:   Wed, 19 Aug 2020 13:10:30 +0800
Tag:    v3.5.16

MDL-68896 mod_scorm: improved sendBeacon use when unloading