code: @Deprecated
      protected String validateValue(String name, String value) {
          return validateAttributeValue(name, value);
      }
docs: Validate a cookie attribute value, throws a {@link IllegalArgumentException} otherwise.
  Only intended to be used by {@link io.netty.handler.codec.http.DefaultCookie}.
  @param name attribute name
  @param value attribute value
  @return the trimmed, validated attribute value
  @deprecated CookieUtil is package private, will be removed once old Cookie API is dropped