When using dumpcap in container environment or with multiple
DPDK processes, it is useful to be able to specify file prefix.
This version only accepts the long format option used by
other commands. If no prefix is specified then the default
is used.
Suggested-by: Arshdeep Kaur <arshdeep.kaur@intel.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Arshdeep Kaur <arshdeep.kaur@intel.com>