files/fail2ban-openrc.init.in: start after nftables

The "after iptables" clause in the OpenRC service script's depend()
function causes fail2ban to start after iptables, if iptables is
scheduled to start. Here we add "after nftables" as well: nftables is
the successor to iptables, and fail2ban supports it out-of-the-box.
If nftables is scheduled to start, we want to wait until it's done
before starting fail2ban.

files/fail2ban-openrc.init.in

@@ -44,7 +44,7 @@ retry="30"
 
 depend() {
 	use logger
-	after iptables
+	after iptables nftables
 }
 
 checkconfig() {