Description:
------------
When running in safemode, you can't call a command like:
'/usr/bin/convert' .
When safemode is off this does work.

It is causing some common scripts to fail, cause they use the hooks to allow people to use spaces or other special signs in the path.


Reproduce code:
---------------
<?
$command="'/usr/bin/convert'";
exec($command,$results,$status);
print_r($results);
echo $status;
?>


Expected result:
----------------
The convert command to be executed.

Actual result:
--------------
Exec returns 127 file not found status.