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I agree that we can make this more clear.
Swifting the warning to the top is fine with me.
Repeating it is not something I like, because I want all files
as small as possible. This is important that the readers takes us serious.

In addition I suggest that we add a marker (macro) for the warning =

which kolabconf will replace to kolabconf.
Then we can control the placement.

The advantage of this is that the warning actually will only be in the
written configuration file itself.