3683 pfiles shouldn't try to trace itself
3684 pfiles crashes on processes with no files
3685 getsockname should set the sa_family_t for unbound unix domain sockets
3686 pfiles shows incorrect socket information on some getsockname calls
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>
Reviewed by: Dan McDonald <danmcd@nexenta.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Garrett D'Amore <garrett@damore.org>
Approved by: Gordon Ross <gwr@nexenta.com>