Developer credits
Git commits in Moodle 2.9.0 by Nelson Moller
commit 413907cff3c1cd504c1b7cbaac616190bb6090c4 Author: Nelson Moller <nmoller@cegepadistance.ca> Date: Thu, 22 Jan 2015 21:57:54 +0800 Tag: v2.9.0-beta MDL-48929 repository_filesystem: Valide relative path against realpath