[fix] image proxify utf urls

    if url.startswith('//'):

        url = 'https:' + url

    url = url.encode('utf-8')

    if not settings['server'].get('image_proxy') and not request.cookies.get('image_proxy'):

        return url

    h = hashlib.sha256(url + settings['server']['secret_key'].encode('utf-8')).hexdigest()

    hash_string = url + settings['server']['secret_key']

    h = hashlib.sha256(hash_string.encode('utf-8')).hexdigest()

    return '{0}?{1}'.format(url_for('image_proxy'),

                            urlencode(dict(url=url, h=h)))

                            urlencode(dict(url=url.encode('utf-8'), h=h)))

def render(template_name, override_theme=None, **kwargs):