Note: help and version output are generated by a naïve script which tries a few variants of
<command> --help, <command> -h etc. to find the command's help and version info.
Sometimes it gets lucky, sometimes it doesn't; if the output below looks wrong, it probably is.
key.dns_resolver --version (return code: 0)
version: 1.0 from keyutils-1.5.9 (2016-07-19)
key.dns_resolver -HELP (return code: None)