>INET6 is defined unconditionally by the inclusion of
>basesrc/lib/libwrap/Makefile.cflags
>INET6 and NETISO (!!!) are both defined unconditionally
>by the inclusion of gnusrc/gnu/usr.sbin/sendmail/Makefile.inc

	we define them unconditionally to help people who gets binary
	distribution happy.  basically, binaries are designed to be
	"protocol independent" - works fine on IPv4-only kernel, IPv4/v6
	kernel and IPv6-only kernel.

	if we make them conditional, binary builds will become complicated
	too much (and impose pain to users).

itojun