Git commits in Moodle 2.7.6 by Nelson Moller

commit ce534d5dfaf58104f559808d076d5129a71ce7cb
Author: Nelson Moller <nmoller@cegepadistance.ca>
Date:   Thu, 22 Jan 2015 21:57:54 +0800
Tag:    v2.7.6

MDL-48929 repository_filesystem: Valide relative path against realpath