Bug fixed 'No such file or directory' with xdebug

Hi,

I don't know if it's really a bug, but in my case is one.

With the "previous" version of php (5.3) and with "php5-xdebug" installation, no directory "mods-available" was created, and so the "/etc/php5/mods-available/xedbug.ini" file didn't exist.

I don't know if my correction is clean, but it's working in my case.

I've also set the "html_errors" to "On" for the 'var_dump' display.