<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <h1>Application links</h1>
    <ul>
        <li><a href="/app/cgivars/">CGI vars</a></li>
        <li><a href="/app/protected/">protected web server resource</a></li>
        <li><a href="/app/sendfile/">web server resource</a></li>
    </ul>
</body>
</html>

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
</head>
<body>
    <h1>Application links</h1>
    <ul>
        <li><a href="/app/cgivars/">CGI vars</a></li>
        <li><a href="/app/protected/">protected web server resource</a>
            <br />This <strong>fails</strong> with an empty page if using
            unpatched httpd older than 2.4.13.
        </li>
        <li><a href="/app/sendfile/">web server resource</a></li>
    </ul>
</body>
</html>

Add hint about why you might get an empty page from the /app/protected/ link
Add hint about why you might get an empty page from the /app/protected/ link
