Git commits in Moodle 3.3.0 by Donald Barrett

commit 4fc74fe587dc9412a95d79ce8eb7821ffb33dde6
Author: Donald Barrett <donald.barrett@learningworks.co.nz>
Date:   Wed, 16 Nov 2016 17:08:59 +0800
Tag:    v3.3.0-beta

MDL-56301 course: Use value for intro field if set in a mods function