anchor.diff:          (set-url-buffer url buffer)))))
   
   (define-endpoint |request.resource| (buffer-id url event-type is-new-window is-known-type
  -                           mouse-button modifiers)
  +                                               mouse-button modifiers)
     "Return whether URL should be loaded or not."
     (declare (ignore event-type))
     (log:debug "Mouse ~a, modifiers ~a" mouse-button modifiers)
  
positive.code:     (remhash window-id windows)))
  
  (define-endpoint |make.buffers| (urls)
    "Create new buffers from URLs."
    ;; The new active buffer should be the first created buffer.
    (when urls
  
negative.code:     (cond
        (is-new-window
         (log:info "Load ~a in new window" url)
         (make-buffers url)
         0)
        ((not is-known-type)
         (log:info "Buffer ~a downloads ~a" buffer url)
  