Git commits in Moodle 3.3.6 by Martin Mastny

commit 8b58e0535c44b3e1979730e609a4c59e5cef6fb8
Author: Martin Mastny <mastnym@vscht.cz>
Date:   Tue, 27 Mar 2018 20:13:38 +0800
Tag:    v3.3.6

MDL-61716 auth_oauth2: field names in mappings allow all characters