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.
ldns-rrsig -V (return code: 1)
*** Could not find any nameserver for --version
ldns-rrsig HELP (return code: 0)
HELP RRSIG(SOA): Tue Mar 14 19:08:01 2017 - Thu Apr 13 19:08:01 2017