Developer credits
Git commits in Moodle 2.8.4 by Nelson Moller
commit 116dd8a02f8fa29b096d714c5e49357dc36c72da Author: Nelson Moller <nmoller@cegepadistance.ca> Date: Thu, 22 Jan 2015 21:57:54 +0800 Tag: v2.8.4 MDL-48929 repository_filesystem: Valide relative path against realpath