Git commits in Moodle 3.9.2 by Sam Marshall

commit 86f5acdc886ff2989c10773d5e011387e3fe94f3
Author: Sam Marshall <s.marshall@open.ac.uk>
Date:   Mon, 20 Jul 2020 12:29:32 +0800
Tag:    v3.9.2

MDL-63252 tool_xmldb: convert default to float to avoid false positives