Extension for how to treat missing files

Thanks for the script.

I had an additional requirement where a missing file is OK.

I therefore extended the script with the optional parameters -x or -X to define the response on missing files.

-x, –fail-on-not-exists
Returns WARN if the file does not exist.
-X, –ok-on-not-exists
Returns OK if the file does not exist.

If somebody is interested in that, you can find it here: https://github.com/ursjoss/check_fileage