Add default login if no htpasswd provided

main.go

@@ -20,7 +20,9 @@ func main() {
 	flag.StringVar(&ThumbsDir, "thumbsdir", "./images/thumbs/", "Directory where generate thumbs")
 	flag.Parse()
 
-	htpasswd := &Htpasswd{}
+	htpasswd := &Htpasswd{
+		entries: map[string]string{"admin": "2fClb0C8dIphk"},
+	}
 
 	if htpasswd_file != nil && *htpasswd_file != "" {
 		log.Println("Reading htpasswd file...")
@@ -28,6 +30,8 @@ func main() {
 		if htpasswd, err = NewHtpasswd(*htpasswd_file); htpasswd == nil {
 			log.Fatal("Unable to parse htpasswd:", err)
 		}
+	} else {
+		log.Println("Using default credentials for administrative part: admin:admin")
 	}
 
 	log.Println("Checking paths...")