[PATH] make ifconfig use getifaddrs

[Sam Leffler]

ifconfig has a hand-rolled version of the code in getifaddrs.  The patch
 here:

http://people.freebsd.org/~sam/ifconfig.patch

(against HEAD) converts it to use getifaddrs.  I'm especially interested
in whether this properly handles ipv6, atalk, ipx, and p2p
configurations.  There should no visible changes in output; if you see
anything please provide the output of ifconfig before+after.

	Sam