The fai-class manpage simply states: "All class names should be written in uppercase letters (execpt the class of the hostname). Do not use a dash, use an underscore."
Which says nothing about umlauts, diacrites and other 'strange' stuff. Is there an official list of allowed characters? For me [a-zA-Z0-9_] would be totally fine. I just want to make sure I'm not forgetting something. I need this info to correctly untaint possible classnames inside a scripts/ perl script. P.S.: The 'execpt' typo is not mine.
