Description:
------------
I`ve 3.0.10 compiled from source with default settings and it doesn`t cache files which were included using relative paths. This is strange, because I have another server (the same version and settings) which works fine.

I`m sure it is related to paths, because after adding realpath() call around path provided in require/include the files are being cached. It is not possible to fix the problem by simply adding realpath() around all includes in our case.

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

include 'dummy.php';

?>

Expected result:
----------------
dummy.php visible on the list of cached files shown by apc.php

Actual result:
--------------
The file which contains the include (let`s call it index.php) is visible on cached files list, but dummy.php is not there.