golang: correct served HTTP path

* do not add the current path to the served path,
  the current path is already read by the flags
* as the path defaults to the current path,
  do not serve the current path, as this would
  make it possible to download the server in source
  or binary form

golang/websockify.go

@@ -88,7 +88,9 @@ func main() {
 		log.Println(err)
 	}
 
-	http.Handle("/", http.FileServer(http.Dir(path+"/"+*web)))
+	if *web != path {
+		http.Handle("/", http.FileServer(http.Dir(*web)))
+	}
 	http.HandleFunc("/websockify", serveWs)
 	log.Fatal(http.ListenAndServe(*source_addr, nil))
 }