Developer credits
Git commits in Moodle 2.6.x by Rod Norfor
commit 03966a4ec070618492a292f86e1bd800b75f8fbd Author: Rod Norfor <rod.norfor@open.ac.uk> Date: Thu, 22 May 2014 00:24:02 +0800 Tag: v2.6.4 MDL-45654 cron: fix non-empty directories deletion