firewall4: update to latest Git HEAD

cf835ce treewide: convert deprecated syntax
c9a3bf5 tests: adapt to latest ucode

Signed-off-by: Jo-Philipp Wich <[email protected]>

package/network/config/firewall4/Makefile

@@ -9,9 +9,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=$(PROJECT_GIT)/project/firewall4.git
-PKG_SOURCE_DATE:=2021-03-31
-PKG_SOURCE_VERSION:=29fba840201287b9265888adba6298779b750af5
-PKG_MIRROR_HASH:=1d26a611aeecdf37f09e4cdee6b192e5da087abf6e0fc7a9ca97a80e58d14222
+PKG_SOURCE_DATE:=2021-09-01
+PKG_SOURCE_VERSION:=cf835cecc8a449b2d2019f1ef4f085e535d5c1c1
+PKG_MIRROR_HASH:=5798b76846107dde69a2a1ff3467f735b9a91a74106fbd6299d8a26eff70b9c2
 PKG_MAINTAINER:=Jo-Philipp Wich <[email protected]>
 PKG_LICENSE:=ISC