Git commits in Moodle 3.2.4 by Alexander Bias

commit f85f0c80da8732bba821c01511a4a8305b80f0b2
Author: Alexander Bias <alexander.bias@uni-ulm.de>
Date:   Wed, 17 May 2017 14:21:08 +0800
Tag:    v3.2.4

MDL-58165 navigation: Add node key to private files navigation node