Git commits in Moodle 3.2.2 by Mark Nelson

commit fd13953a8a97950825f315197764257df3ba6a41
Author: Mark Nelson <markn@moodle.com>
Date:   Mon, 20 Feb 2017 12:37:09 +0800
Tag:    v3.2.2

MDL-58014 core_message: fixed unread message count

commit bac13609ca579499cc90249b84da7c274fe1c57c
Author: Mark Nelson <markn@moodle.com>
Date:   Thu, 16 Feb 2017 12:54:36 +0800
Tag:    v3.2.2

MDL-57967 core_message: do not process conversations from deleted users