Git commits in Moodle 3.5.6 by Nicolas Roeser

commit 43121fbe8b952bb4173a2da9f7ca6dfa18b3a799
Author: Nicolas Roeser <nicolas.roeser@uni-ulm.de>
Date:   Mon, 11 Mar 2019 20:12:24 +0800
Tag:    v3.5.6

MDL-64790 upgrade: parameter API doc regression fix