pull up r23533 from trunk

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 r23533 | tlyu | 2009-12-28 21:42:51 -0500 (Mon, 28 Dec 2009) | 10 lines

 ticket: 6608
 subject: MITKRB5-SA-2009-003 CVE-2009-3295 KDC null deref in referrals
 tags: pullup
 target_version: 1.7.1

 On certain error conditions, prep_reprocess_req() calls kdc_err() with
 a null pointer as the format string, causing a null dereference and
 denial of service.  Legitimate protocol requests can trigger this
 problem.

https://github.com/krb5/krb5/commit/6419f49ecd068cb116d1ebe6010ac03f22aa9f83
Commit By: tlyu
Revision: 23534
Changed Files:
U   branches/krb5-1-7/src/kdc/do_tgs_req.c
U   branches/krb5-1-7/src/lib/kadm5/logger.c