Description:
------------
My postfix filter scripts written in PHP stopped working after an upgrade to php-5.2.11, the issue can be tracked down to PHP with a simplified script.

Reproduce code:
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Create a postfix policy filter, it is enough to create a simple get and store script like this:

<?php
    $fd = STDIN;
    $rq = '';
    while(!feof($fd)) $rq .= fgets($fd,1024);
    file_put_contents('/tmp/req',$rq);
?>


Expected result:
----------------
I expect the /tmp/req file to be filled with postfix's request attributes (attrib=value pairs).


Actual result:
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With 5.2.11: The file is empty.
With 5.2.10: The file is OK, filled with attributes.