Git commits in Moodle 3.0.8 by John Okely

commit fdaea8ad644bf835a3225f4bdf64ecc6ba36aeb7
Author: John Okely <john@moodle.com>
Date:   Fri, 02 Dec 2016 14:34:18 +0800
Tag:    v3.0.8

MDL-57193 auth_db: Use a recordset and array_key_exists