Fix regex to match format of iptables-save from iptables >= 1.4.11

cleanup_rules.awk optimizes the set of rules from iptables-save output.
In iptables < 1.4.11 the lines with these rules contains a trailing space,
in iptables >= 1.4.11 that trailing space is ommited.

Patch by Nikolay A. Fetisov

Index: fiaif-1.23.1/src/cleanup_rules.awk
===================================================================
--- fiaif-1.23.1.orig/src/cleanup_rules.awk	2013-01-19 18:08:34.000000000 +0100
+++ fiaif-1.23.1/src/cleanup_rules.awk	2013-01-21 10:47:52.657007610 +0100
@@ -43,7 +43,7 @@ function scan_rule(string,
         chain = substr(string, RSTART, RLENGTH);
 	spec_start = RLENGTH+2;
 
-        if ( match(string, "-j[ ][a-zA-Z0-9_+]+.*") == 0) {
+        if ( match(string, "-j[ ][a-zA-Z0-9_+]+.*[^ ]") == 0) {
 	    printf("Rule with no target: -A %s %s\n", chain, specification);
 	    return;
 	}
