code: public static Tag clientName(ClientRequest request) {
  		String host = request.url().getHost();
  		if (host == null) {
  			return CLIENT_NAME_NONE;
  		}
  		return Tag.of("clientName", host);
  	}
docs: Create a {@code clientName} {@code Tag} derived from the
  {@link java.net.URI#getHost host} of the {@link ClientRequest#url() URL} of the
  given {@code request}.
  @param request the request
  @return the clientName tag