fff-firewall: Flush all installed tables.

With this patch all installed tables are flushed.
We no longer have to worry about the modules
installed or not. (nat, mangle ...)

Signed-off-by: Robert Langhammer <rlanghammer@web.de>

src/packages/fff/fff-firewall/files/usr/lib/firewall.d/00-prepare

@@ -2,8 +2,5 @@
 ebtables -F
 ebtables -X
 
-iptables -F
-iptables -X
-
-ip6tables -F
-ip6tables -X
+iptables-save  | awk '/^[*]/ { print $1 } /^:[A-Z]+ [^-]/ { print $1 " ACCEPT" ; }  /COMMIT/ { print $0; }' | iptables-restore
+ip6tables-save | awk '/^[*]/ { print $1 } /^:[A-Z]+ [^-]/ { print $1 " ACCEPT" ; }  /COMMIT/ { print $0; }' | ip6tables-restore