jool: downgrade to v4.0.9

Jool v4.1.0 suffers from bad offload management as well as broken
stateful NAT64 translation. See upstream issues #331 as well as #332 for
more information.

Downgrade to v4.0.9 until these are ironed out.

Tested on: ipq40xx-generic

Fixes commit 0a6891feac ("jool: update to v4.1.0")
Signed-off-by: David Bauer <mail@david-bauer.net>

net/jool/Makefile

@@ -8,12 +8,12 @@ include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
 
 PKG_NAME:=jool
-PKG_VERSION:=4.1.0
+PKG_VERSION:=4.0.9
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://github.com/NICMx/Jool/releases/download/v$(PKG_VERSION)
-PKG_HASH:=7acdb1cd96b5f856fc75a9ee97758bb4dfb4cd7af4af26f88d512b5ac71f01a0
+PKG_HASH:=d42215f87abf2e113bc039d23e6b4e1c39cafc90f0e5584adf0e40e996c68ffb
 
 PKG_MAINTAINER:=
 PKG_LICENSE:=GPL-2.0-only