[Request]: add 'mariadb' as database configuration option

[joostdekeijzer]

DBI::mysql requires MySQLv8 since https://github.com/perl5-dbi/DBD-mysql/commit/7e1ce07e70a9d59c695ba9d18150201e30e8f3b9 which can be annoying when you use MariaDB (or another MySQL version).

It would be nice if the DBI type can support MariaDB?

I did a quick test, it seems dbx_mysql.pl can stay unchanged but the report-parser.pl script needs some refactor.