pull up r24286 from trunk

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 r24286 | ghudson | 2010-09-02 11:35:25 -0400 (Thu, 02 Sep 2010) | 7 lines

 ticket: 6764
 tags: pullup
 target_version: 1.8.4

 Properly search for MANDATORY-FOR-KDC authdata elements.  Reported by
 Mike Roszkowski.

https://github.com/krb5/krb5/commit/d4da5fa8b83164300b97d0d3b1a859c76335c65a
Commit By: tlyu
Revision: 24459
Changed Files:
U   branches/krb5-1-8/src/kdc/kdc_authdata.c