Let ifdown control all interfaces.

doc/net.example.Linux.in

@@ -1010,7 +1010,7 @@
 
 #postdown() {
 #	# Enable Wake-On-LAN for every interface except for lo
-#	# Probably a good idea to set RC_DOWN_INTERFACE="no" in /etc/conf.d/rc
+#	# Probably a good idea to set ifdown="no" in /etc/conf.d/net
 #	# as well ;)
 #	[ "${IFACE}" != "lo" ] && ethtool -s "${IFACE}" wol g
 

init.d/net.lo.in

@@ -668,7 +668,7 @@ stop()
 	if ! yesno ${IN_BACKGROUND} && \
 	[ "${IFACE}" != "lo" -a "${IFACE}" != "lo0" ]; then
 		eval module=\$ifdown_${IFVAR}
-		module=${module:-YES}
+		module=${module:-${ifdown:-YES}}
 		yesno ${module} && _down 2>/dev/null
 	fi