Git commits in Moodle 2.7.17 by Ankit Agarwal

commit d4f9bdbcc10a3db517105a7cfb3ab1fca9a7064d
Author: Ankit Agarwal <ankit@moodle.com>
Date:   Wed, 02 Nov 2016 18:36:20 +0800
Tag:    v2.7.17

MDL-55777 installation: Check libcurl version on install