* IPv4 and IPv6 network files can be selected with -i4 and -i6.
(IPv6 network file selection is only possible when lsof supports
IPv6 for the dialect.)
* Added new output field for raw device number in hex. The field is
identified with 'r'. This field is NOT selected when -F or -F0 is
specified so that its appearance won't disturb existing scripts that
process field output.