Correct issues with debugging the generated script

a) Rename DEBUG to g_debug_iptablesb
b) Clear all of the tables prior to handling iptables-restore input.

Shorewall/Perl/Shorewall/Chains.pm

@@ -6514,7 +6514,7 @@ sub create_netfilter_load( $ ) {
     #
     emit(  'exec 3>&-',
 	   '',
-	   '[ -n "$DEBUG" ] && command=debug_restore_input || command=$' . $UTILITY,
+	   '[ -n "$g_debug_iptables" ] && command=debug_restore_input || command=$' . $UTILITY,
 	   '',
 	   'progress_message2 "Running $command..."',
 	   '',

Shorewall/Perl/prog.footer

@@ -62,12 +62,14 @@ checkkernelversion() {
 #
 # Start trace if first arg is "debug" or "trace"
 #
+g_debug_iptables=
+
 if [ $# -gt 1 ]; then
     if [ "x$1" = "xtrace" ]; then
 	set -x
 	shift
     elif [ "x$1" = "xdebug" ]; then
-	DEBUG=Yes
+	g_debug_iptables=Yes
 	shift
     fi
 fi

Shorewall/lib.core

@@ -510,6 +510,19 @@ debug_restore_input() {
 	qt1 $g_tool -t raw -P $chain ACCEPT
     done
 
+    qt1 $g_tool -t rawpost -F
+    qt1 $g_tool -t rawpost    -X
+
+    for chain in POSTROUTING; do
+	qt1 $g_tool -t rawpost -P $chain ACCEPT
+    done
+
+    qt1 $g_tool -t nat    -F
+    qt1 $g_tool -t nat    -X
+
+    for chain in PREROUTING POSTROUTING; do
+        qt1 $g_tool -t nat -P $chain ACCEPT
+
     qt1 $g_tool -t filter -F
     qt1 $g_tool -t filter -X