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.
nfnl_osf -V (return code: 255)
nfnl_osf: invalid option -- '-'
Usage: nfnl_osf -f fingerprints -d <del rules> -h
nfnl_osf --help (return code: 255)
nfnl_osf: invalid option -- '-'
Usage: nfnl_osf -f fingerprints -d <del rules> -h