404-server: Parse command line flags

The command line flags were ignored, even though they are defined in the
code.

Author: louis-paul

404-server/server.go

@@ -26,6 +26,7 @@ import (
 var port = flag.Int("port", 8080, "Port number to serve default backend 404 page.")
 
 func main() {
+	flag.Parse()
 	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusNotFound)
 		fmt.Fprint(w, "default backend - 404")