Use a more straightforward return style in script rules. Instead of

if cond then
		return true
	else
		return false
	end

just do

	return cond

scripts/dns-random-txid.nse

@@ -1,4 +1,3 @@
-
 description = [[
 Checks a DNS server for the predictable-TXID DNS recursion
 vulnerability.  Predictable TXID values can make a DNS server vulnerable to