Git commits in Moodle 3.8.6 by Tim Schroeder

commit 482d85942f50548bda9200ca5b2c27070146f8ce
Author: Tim Schroeder <t.schroeder@itc.rwth-aachen.de>
Date:   Fri, 17 Apr 2020 03:40:01 +0800
Tag:    v3.8.6

MDL-68438 message: fixed email format change with messaging disabled