/usr/share/php/HTMLPurifier/URIScheme/https.php is in php-htmlpurifier 4.7.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18  | <?php
/**
 * Validates https (Secure HTTP) according to http scheme.
 */
class HTMLPurifier_URIScheme_https extends HTMLPurifier_URIScheme_http
{
    /**
     * @type int
     */
    public $default_port = 443;
    /**
     * @type bool
     */
    public $secure = true;
}
// vim: et sw=4 sts=4
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