Remove gentoo's net.* scripts

It has been determined that it will be best for gentoo's net.* scripts
to be in a separate package to allow independent development.
This package will be called netifrc and maintained by Gentoo.

runlevels/Makefile

@@ -1,3 +1,5 @@
+include ../mk/net.mk
+
 BOOT=		bootmisc fsck hostname localmount loopback \
 		root swap swapfiles sysctl urandom ${BOOT-${OS}}
 DEFAULT=	local netmount
@@ -10,7 +12,7 @@ BOOTDIR=	${LEVELDIR}/boot
 DEFAULTDIR=	${LEVELDIR}/default
 SHUTDOWNDIR=	${LEVELDIR}/shutdown
 
-ifeq (${MKNET},)
+ifeq (${MKNET},yes)
 BOOT+= network staticroute
 endif
 
@@ -25,12 +27,6 @@ BOOT-${OS}=
 SHUTDOWN-${OS}=
 SYSINIT-${OS}=
 
-ifeq (${MKNET},oldnet)
-BOOT-FreeBSD+= net.lo0
-BOOT-Linux+= net.lo
-BOOT-NetBSD+= net.lo0
-endif
-
 BOOT-BSD=	hostid newsyslog savecore syslogd swap-blk
 
 # Generic BSD stuff