Developer credits
Git commits in Moodle 2.8.x by Brendan Heywood
commit be72c3df676c01919195f9f6ff1eaaf149812eff Author: Brendan Heywood <brendan@catalyst-au.net> Date: Thu, 02 Apr 2015 14:41:48 +0800 Tag: v2.8.6 MDL-49740 Lock: Fixed task lock release bugs