feat(iplist2rule): add comment describing how rule was generated

Signed-off-by: Xe Iaso <me@xeiaso.net>

utils/cmd/iplist2rule/main.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/TecharoHQ/anubis/lib/config"
 	"github.com/facebookgo/flagenv"
@@ -85,9 +86,10 @@ func main() {
 	if err != nil {
 		log.Fatalf("can't create output file %q: %v", foutName, err)
 	}
-
 	defer fout.Close()
 
+	fmt.Fprintf(fout, "# Generated by %s on %s from %s\n\n", filepath.Base(os.Args[0]), time.Now().Format(time.RFC3339), blocklistURL)
+
 	data, err := yaml.Marshal([]*Rule{result})
 	if err != nil {
 		log.Fatalf("can't marshal yaml")