Usage: zckdl [OPTION...] <file>
zckdl - Download zchunk file

      --fail-no-ranges       If server doesn't support ranges, fail instead of
                             downloading full file
  -q, --quiet                Only show warnings (can be specified twice to only
                             show errors)
  -s, --source=FILE          File to use as delta source
  -v, --verbose              Increase verbosity
  -?, --help                 Give this help list
      --usage                Give a short usage message
  -V, --version              Show program version

Mandatory or optional arguments to long options are also mandatory or optional
for any corresponding short options.