Developer credits
Git commits in Moodle 2.6.9 by Zachary Durber
commit 71ab589855e6ce9fa9a30051f8efd6153284344e Author: Zachary Durber <zdurber@gmail.com> Date: Mon, 05 Jan 2015 11:01:34 +0800 Tag: v2.6.9 MDL-38466 filters: ReDoS protection for text to URL conversion.