Internationalization may affect check_configuration.sh

[maxonthegit]

The check_configuration.sh script may incorrectly report the Netkit setup as faulty.
This is due to the fact that the output of some of the commands used for the check may be misinterpreted when it is translated according to the system language.
Most notably, the problem affects 08-check_filesystem.sh, where the output of stat -f . may be translated.
A possible solution is to use stat -f -c %T . instead.