Description:
------------
unlink()ing a symlink with its target missing fails with an open_basedir error.

This might be related to
http://bugs.php.net/bug.php?id=20235 (actual deletion changed, but sanitization still uses target?) and/or
http://bugs.php.net/bug.php?id=29145 (missing target (empty string?) is considered to be outside of open_basedir?)


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

echo "creating link\n";
symlink('nonexisting_target', 'link');

echo "unlinking link\n";
unlink('link');

echo "creating target\n";
file_put_contents('nonexisting_target', 'foo');

echo "unlinking link (again)\n";
unlink('link');

echo "unlinking target\n";
unlink('nonexisting_target');


Expected result:
----------------
Run with php -d open_basedir=

creating link
unlinking link
creating target
unlinking link (again)

Warning: unlink(link): No such file or directory in /tmp/- on line 13
unlinking target


Actual result:
--------------
Run with php -d open_basedir=/

creating link
unlinking link

Warning: unlink(): open_basedir restriction in effect. File(link) is not within the allowed path(s): (/) in /tmp/- on line 7
creating target
unlinking link (again)
unlinking target