Author: Matteo Scaramuccia
MDL-51080 env: warn when running MariaDB w/ wrong dbtype
http://git.moodle.org/gw?p=moodle.git;a=commit;h=5df53c769ee7b7cfee32c18f5dd8504c0060b77f
http://github.com/moodle/moodle/commit/5df53c769ee7b7cfee32c18f5dd8504c0060b77f
+ 3.5 en [environmentmariadbwrongdbtype,core_admin]