Help is printed with -h or --help.
Help is also printed for an unknown option.
This was broken since the rework of options.
Fixes: 489a9d6c9f77 ("merge bsd and linux common options parsing")
Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
Acked-by: David Marchand <david.marchand@6wind.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
a906cf28fd