Git commits in Moodle 2.9.5 by Rex Lorenzo

commit 16d73f6748ab60d8ab3e8ed3903e87f1d5565011
Author: Rex Lorenzo <rex@oid.ucla.edu>
Date:   Wed, 10 Feb 2016 06:17:40 +0800
Tag:    v2.9.5

MDL-53046 mod_lti: Should prefer site-wide configured key/secret