/usr/bin/varnishstat: invalid option -- '-'
Usage: /usr/bin/varnishstat <options>

Options:
 [-1]                      Print the statistics to stdout
 [-c]                      Live (curses) mode
 [-f <glob>]               Legacy field filtering glob
 [-h]                      Usage help
 [-I <glob>]               Field inclusion glob
 [-j]                      Print statistics to stdout as JSON
 [-l]                      Lists the available fields to use with the -f option
 [-n <workdir>]            varnish working directory
 [-r]                      Toggle raw or adjusted gauges
 [-t <seconds|off>]        VSM connection timeout
 [-V]                      Version
 [-X <glob>]               Field exclusion glob
 [-x]                      Print statistics to stdout as XML