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krb5_parse_name() interprets \n, \t, \b, and \0 as newline, tab, bell, 
and nul, and passes through anything else unchanged.  So \t\e\s\t is TAB 
e s TAB, while te\st is just test.

This is really old behavior even if it's not very consistent or 
intuitive, so I don't think we want to touch it without a good reason.