The Config Transpiler, ct, is the utility responsible for transforming a
user-provided Container Linux Configuration into an Ignition configuration.
The resulting Ignition config can then be provided to a Container Linux machine
when it first boots in order to provision it.
WWW: https://coreos.com/os/docs/latest/overview-of-ct.html
see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227584