Git commits in Moodle 3.6.1 by Bas Brands

commit 5d30474242106d03b58fd24af76cd312aa6882ba
Author: Bas Brands <bas@moodle.com>
Date:   Fri, 24 Aug 2018 21:31:14 +0800
Tag:    v3.6.1

MDL-63223 theme_boost: flexbox for login pagin footer