added system tests

bin/tests/system/dnssec/setup.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+cd ns2 && sh sign.sh
+
+if [ $# -gt 0 ]
+then
+   case $1 in
+	--badsig)
+	   echo "injecting bogus data to force signature checking to fail..." >&2
+	   echo "a.secure.example.	A	10.0.0.22" >>../ns3/secure.example.db.signed
+	;;
+	
+	*)
+	    echo "unknown option $1" >&2; exit 1
+	;;
+    esac
+fi