Git commits in Moodle 3.1.x by Michael Hawkins

commit 7ea1b25cac963f6727d8e89f2d678f47308b43cb
Author: Michael Hawkins <michaelh@moodle.com>
Date:   Mon, 18 Mar 2019 15:23:59 +0800
Tag:    v3.1.18

MDL-61738 messageinbound: Fix quota checks & filesize for email uploads

commit 3d2783690da2281e5e360c40961cd6846e1dbbb8
Author: Michael Hawkins <michaelh@moodle.com>
Date:   Thu, 20 Dec 2018 10:11:23 +0800
Tag:    v3.1.16

MDL-64395 groups: Added XSS Risk to the manage groups capability

commit 3681c247f5a18d96e78919594c4408cc315f7ad7
Author: Michael Hawkins <michaelh@moodle.com>
Date:   Tue, 11 Dec 2018 14:27:13 +0800
Tag:    v3.1.16

MDL-64372 userpix: Escape fullname string on userpix index page