*
     * @param url the original URL
     * @param canonicalUrl the canonical URL to validate
     * @return true if the canonical URL is valid, false otherwise
     */
    protected boolean isValidCanonicalUrl(final String url, final String canonicalUrl) {
        if (url.startsWith("https:") && canonicalUrl.startsWith("http:")) {
            if (logger.isDebugEnabled()) {