Git commits in Moodle 3.1.16 by Andrew Nicols

commit 808954253e716cdbae06be111c0f8bd6e0508b88
Author: Andrew Nicols <andrew@nicols.co.uk>
Date:   Tue, 08 Jan 2019 11:56:41 +0800
Tag:    v3.1.16

MDL-64520 iplookup: Remove failing unit tests