Git commits in Moodle 3.6.3 by Viktor

commit cd3060d941a051931eb2613b25bafb0108665895
Author: Viktor <viktor.khokhryakov@gmail.com>
Date:   Mon, 04 Feb 2019 16:10:25 +0800
Tag:    v3.6.3

MDL-62702 core_lib: fix broken verification signature