Description:
------------
File upload does not work.

upload_tmp_dir = /tmp   is set in php.ini

downgrade to 4.4.4 fix the problem

Reproduce code:
---------------
<?php

$uploaddir = '/home/xxxx/www/xxxx/test';
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);

echo '<pre>';
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
    echo "File is valid, and was successfully uploaded.\n";
} else {
    echo "Possible file upload attack!\n";
}

echo 'Here is some more debugging info:';
print_r($_FILES);

print "</pre>";

?>


Expected result:
----------------
file should be uploaded nad moved to dest-directory

Actual result:
--------------
(
    [userfile] => Array
        (
            [name] => test.txt
            [type] => 
            [tmp_name] => 
            [error] => 6
            [size] => 0
        )

)