formatting error log

weed/server/volume_server_handlers_read.go

@@ -73,7 +73,7 @@ func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 	if n.Cookie != cookie {
-		glog.V(0).Infoln("request", r.URL.Path, "with unmaching cookie seen:", cookie, "expected:", n.Cookie, "from", r.RemoteAddr, "agent", r.UserAgent())
+		glog.V(0).Infof("request %s with cookie:%x expected:%x from %s agent %s", r.URL.Path, cookie, n.Cookie, r.RemoteAddr, r.UserAgent())
 		w.WriteHeader(http.StatusNotFound)
 		return
 	}