Developer credits
Git commits in Moodle 2.2.6 by Tomasz Muras
commit 237897b9681e1d0a24b9a43837f92f479c08e659 Author: Tomasz Muras <nexor1984@gmail.com> Date: Mon, 24 Sep 2012 01:25:30 +0800 Tag: v2.2.6 MDL-35547 Fetch more sub-categories with one SQL query.
commit 8c39dfb9ba5e4344f6176f2a979527aee6c03072 Author: Tomasz Muras <nexor1984@gmail.com> Date: Sat, 22 Sep 2012 04:01:06 +0800 Tag: v2.2.6 MDL-35547 Detect loops in question categories.
commit 54e95b2d334851183f342da254275078d9ecb43a Author: Tomasz Muras <nexor1984@gmail.com> Date: Thu, 20 Sep 2012 23:48:14 +0800 Tag: v2.2.6 MDL-35547 Detect question category pointing to itself as a parent.