Developer credits
Git commits in Moodle 2.6.7 by Jetha Chan
commit 52555c36989b6704550ed0b3c6e832f5e7e150b7 Author: Jetha Chan <jetha@moodle.com> Date: Wed, 12 Nov 2014 15:03:32 +0800 Tag: v2.6.7 MDL-47920 mod_lti: add capability checks, http headers