MariaDB: Aria engine is not enabled or did not start. The Aria engine must be enabled to continue as mysqld was configured with --with-aria-tmp-tables

If MariaDB (mysqld) isn't starting, and you're getting this error:

Aria engine is not enabled or did not start. The Aria engine must be enabled to continue as mysqld was configured with --with-aria-tmp-tables

1. first make a full backup of your /var/lib/mysql folder.
2. Next try renaming the aria_log_control to something else, eg:

   cd /var/lib/mysql
   mv aria_log_control aria_log_control.moved

3. Then try to restart mysqld

   service mysqld

It is safe to delete this file, but only if MariaDB is not running:
https://mariadb.com/kb/en/library/aria-faq/#when-is-it-safe-to-remove-old-log-files