Sometimes, it's confused whether this example option -> mysql_inst
is part of custombuild or directadmin option especially for newbie.
Custombuild is part of core feature in directadmin, so why not we combine the options.
So, we can just do this to set both directadmin.conf and options.conf:
directadmin set ssl
directadmin set mysql_inst mariadb (DA should be able to determine if this setting belongs to custombuild).