Avoid crashes with Adaptive QoS on newer routers

Remove POSTROUTING rules as you really only need OUTPUT rules to capture the speedtest upload traffic originating from the router.

This avoids conflicts with newer routers where changing the packet mark after Adaptive QoS has classified the packet can cause the router to crash.

spdmerlin.sh

@@ -1465,9 +1465,7 @@ Run_Speedtest(){
 							iptables "$ACTION" OUTPUT -p "$proto" -o "$(Get_Interface_From_Name WAN)" -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
 							iptables "$ACTION" OUTPUT -p "$proto" -o tun1+ -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
 							iptables -t mangle "$ACTION" OUTPUT -p "$proto" -o "$(Get_Interface_From_Name WAN)" -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
-							iptables -t mangle "$ACTION" POSTROUTING -p "$proto" -o "$(Get_Interface_From_Name WAN)" -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
 							iptables -t mangle "$ACTION" OUTPUT -p "$proto" -o tun1+ -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
-							iptables -t mangle "$ACTION" POSTROUTING -p "$proto" -o tun1+ -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
 						done
 						stoppedqos="true"
 					done
@@ -1712,9 +1710,7 @@ Run_Speedtest(){
 						iptables -D OUTPUT -p "$proto" -o "$(Get_Interface_From_Name WAN)" -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
 						iptables -D OUTPUT -p "$proto" -o tun1+ -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
 						iptables -t mangle -D OUTPUT -p "$proto" -o "$(Get_Interface_From_Name WAN)" -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
-						iptables -t mangle -D POSTROUTING -p "$proto" -o "$(Get_Interface_From_Name WAN)" -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
 						iptables -t mangle -D OUTPUT -p "$proto" -o tun1+ -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
-						iptables -t mangle -D POSTROUTING -p "$proto" -o tun1+ -j MARK --set-xmark 0x80000000/0xC0000000 2>/dev/null
 					done
 				elif [ "$(nvram get qos_enable)" -eq 1 ] && [ "$(nvram get qos_type)" -ne 1 ] && [ -f /tmp/qos ]; then
 					/tmp/qos start >/dev/null 2>&1