Fixed memory leaking

+ Patch on memory leaking for Windows netstat module (do not effect any of the previous non Windows builds)
+ Fixed potential memory leak in acme handler logic
+ Added "do you want to get a TLS certificate for this subdomain?" dialog when a new subdomain proxy rule is created

src/acme.go

@@ -66,6 +66,7 @@ func acmeRegisterSpecialRoutingRule() {
 			}
 
 			resBody, err := ioutil.ReadAll(res.Body)
+			defer res.Body.Close()
 			if err != nil {
 				fmt.Printf("error reading: %s\n", err)
 				return