init sysv: enable route_localnet only for IFACE_LAN

init.d/sysv/zapret

@@ -242,7 +242,7 @@ prepare_tpws()
 	id -u $TPWS_USER >/dev/null 2>/dev/null || useradd --no-create-home --system --shell /bin/false $TPWS_USER
 	# otherwise linux kernel will treat 127.0.0.1 as "martian" ip and refuse routing to it
 	# NOTE : kernels <3.6 do not have this feature. consider upgrading or change DNAT to REDIRECT and do not bind to 127.0.0.1
-	for iface in /proc/sys/net/ipv4/conf/*; do sysctl -qw net.ipv4.conf.$(basename $iface).route_localnet=1; done
+	[ -n "$IFACE_LAN" ] && sysctl -qw net.ipv4.conf.$IFACE_LAN.route_localnet=1
 }
 
 run_tpws()