net/mwan3-luci: fix iface_state on on status page

Since commit 4739584c24 the status of the
interface is not reported correctly anymore. To fix this issue do not test
if the routing table is presented use instead the "/var/run/iface_state/[iface]"
to get the interface state because the routing table will not get deleted
anymore if the interface is offline.

Signed-off-by: Florian Eckert <fe@dev.tdt.de>

net/mwan3-luci/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luci-app-mwan3
 PKG_VERSION:=1.4
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 PKG_MAINTAINER:=Aedan Renner <chipdankly@gmail.com>
 PKG_LICENSE:=GPLv2
 

net/mwan3-luci/files/usr/lib/lua/luci/controller/mwan3.lua

@@ -65,7 +65,8 @@ end
 
 function getInterfaceStatus(ruleNumber, interfaceName)
 	if ut.trim(sys.exec("uci -p /var/state get mwan3." .. interfaceName .. ".enabled")) == "1" then
-		if ut.trim(sys.exec(ip .. "route list table " .. ruleNumber)) ~= "" then
+		local fs = require "nixio.fs"
+		if fs.readfile("/var/run/mwan3/iface_state/%s" % interfaceName) == "online" then
 			if ut.trim(sys.exec("uci -p /var/state get mwan3." .. interfaceName .. ".track_ip")) ~= "" then
 				return "online"
 			else