Personally, I like seeing ports and IPs numerically, but prefer protocols
to be shown by name.  As such, add a third --numeric level which will
show protocols by number, splitting them out from ports.

  -n/--numeric                  When specified once, show network addresses numerically.
                                When specified twice, also show Internet services,
                                user IDs and group IDs numerically.
                                When specified thrice, also show protocols numerically.

Phil

Signed-off-by: Phil Oester <kernel@linuxace.com>