Git commits in Moodle 2.8.10 by Juan Leyva

commit 535fd9678f6b69943247b50581cd85c6973e286e
Author: Juan Leyva <juanleyvadelgado@gmail.com>
Date:   Mon, 16 Nov 2015 23:01:53 +0800
Tag:    v2.8.10

MDL-52072 enrol: Fix course visibility checks in external functions