Description:
------------
http://qa.php.net/ is failing with "500 Internal Server Error" since yesterday.

Test script:
---------------
$ curl -v http://qa.php.net/
*   Trying 2604:a880:800:10::2d6:2001...
* TCP_NODELAY set
* Connected to qa.php.net (2604:a880:800:10::2d6:2001) port 80 (#0)
> GET / HTTP/1.1
> Host: qa.php.net
> User-Agent: curl/7.51.0
> Accept: */*
>
* HTTP 1.0, assume close after body
< HTTP/1.0 500 Internal Server Error
< Date: Tue, 13 Jun 2017 05:55:22 GMT
< Server: Apache/2.2.22 (Debian)
< X-Powered-By: PHP/5.4.34-0+deb7u1
< Vary: Accept-Encoding
< Content-Length: 0
< Connection: close
< Content-Type: text/html
<
* Curl_http_done: called premature == 0
* Closing connection 0