Git commits in Moodle 3.6.3 by sam marshall

commit 68157ec22fc0fb33f7ab1e5850a90ded03f62504
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Wed, 27 Feb 2019 18:58:02 +0800
Tag:    v3.6.3

MDL-64961 REST web service: Fatal error in error handler