增加-dns参数启用dnslog poc

WebScan/lib/check.go

@@ -82,7 +82,9 @@ func executePoc(oReq *http.Request, p *Poc) (bool, error, string) {
 	for _, item := range p.Set {
 		k, expression := item.Key, item.Value
 		if expression == "newReverse()" {
-			return false, nil, ""
+			if !common.DnsLog {
+				return false, nil, ""
+			}
 			variableMap[k] = newReverse()
 			continue
 		}