code: public void handleAddProxyConnectionHeader(HttpMethod method) {
          Header h = method.getRequestHeader("Proxy-Connection");
          if (h != null) {
              h.setValue("close");
              method.setRequestHeader(h);
          }
      }
docs: If a 'Proxy-Connection' header has been added to the request,
  it'll be of a 'keep-alive' type.  Until we support 'keep-alives',
  override the Proxy-Connection setting and instead pass a 'close'
  (Otherwise every request has to timeout before we notice
  end-of-document).
  @param method Method to find proxy-connection header in.