applications/luci-splash: Get parent interface from ifname option. This is for the new syntax where interfaces are used for aliases. The alias notation (config alias in /etc/config/network) is no longer supported by luci-splash.

applications/luci-splash/root/etc/init.d/luci_splash

@@ -36,7 +36,9 @@ iface_add() {
 	config_get netmask "$net" netmask
 	[ -n "$netmask" ] || return 0
 
-	config_get parentiface "$net" interface
+	parentiface="$(uci -q get network.${net}.ifname)"
+	parentiface=${parentiface#@}
+
 	[ -n "$parentiface" ] && {
 		config_get parentproto   "$parentiface" proto
 		config_get parentipaddr  "$parentiface" ipaddr