added makefile and corrected mistake in makeconf script

Makefile

@@ -0,0 +1,25 @@
+SRC = ./
+NFT = nftables.conf.nft
+
+all:
+	$(info run make makeconf to unify .nft files into nftables.conf)
+	$(info run make install to install nftables.conf in /etc and set as current ruleset)
+	$(info run make uninstall to replace /etc/nftables.conf with backup and set as current ruleset)
+
+makeconf:
+	$(info running makeconf.sh)
+	$(SRC)makeconf.sh
+
+install: makeconf
+	$(info backing up current nftables rules)
+	cp /etc/nftables.conf $(SRC)backup.conf || nft list ruleset > $(SRC)backup.conf
+	$(info installing new nftables rules)
+	cp $(SRC)$(NFT) /etc/nftables.conf
+	$(info reloading nftables rules)
+	nft -f /etc/nftables.conf
+
+uninstall:
+	$(info replacing nftables.conf with backup)
+	cp $(SRC)backup.conf /etc/nftables.conf
+	$(info reloading nftables rules)
+	nft -f /etc/nftables.conf

makeconf.sh

@@ -24,6 +24,8 @@ done
 
 counter=${counter}-1
 mv "${filename}""${counter}".nft nftables.conf
+counter=${counter}-1
+
 while [ ${counter} -ge 0 ]
 do
   rm "${filename}""${counter}".nft