Christian S.J. Peron e5ad5f4d70 Change auditon(2) so that if somebody supplies an invalid command, it
returns EINVAL. Right now we return 0 or success for invalid commands,
which could be quite problematic in certain conditions.

MFC after:	1 week
Discussed with:	rwatson
2008-03-06 22:57:03 +00:00
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