Config expire_logs_days should not be on by default (Closes: #1058671)
requested to merge otto/mariadb-server:bugfix/1058671-disable-expire-logs-days-conf into debian/latest
Without this starting mariadb-server generates the following message:
[Warning] You need to use --log-bin to make --expire-logs-days or
--binlog-expire-logs-seconds work.