session garbage collector does not read conf.d

The cron job in `/etc/cron.d/php5` is executing the command line php and calls `ini_get_all("session")` then reads the value of `session.gc_maxlifetime`.

However, that does not capture any options set in `/etc/php5/apache2/conf.d` which is read by the apache2 mod-php5, nor any of the SAPIs' conf.d dirs in `/etc/php5/*/conf.d`.

So the script does not see what the actual production PHP sees ...

The actual problem is that all sane admins do not modify `/etc/php5/apache2/php.ini` directly but instead add an .ini file in the `conf.d` directory with our customized settings for them to persist across upgrades, otherwise it's a hassle everytime there is a PHP upgrade. That was the whole point of the `conf.d` directory ...

The `/etc/cron.d/php5` script should also load the .ini files in `conf.d` dir. That's where I set my `session.gc_maxlifetime`, which is now ignored and my sessions are killed early ...

The simplest fix is to prepend `PHP_INI_SCAN_DIR="/etc/php5/${conf_dir}/conf.d"` to the php command:

`PHP_INI_SCAN_DIR="/etc/php5/${conf_dir}/conf.d" php5 -c /etc/php5/${conf_dir}/php.ini -d .......`