pull up r23766 from trunk

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 r23766 | ghudson | 2010-03-05 12:45:46 -0500 (Fri, 05 Mar 2010) | 10 lines

 ticket: 6676
 subject: Ignore improperly encoded signedpath AD elements
 target_version: 1.8.1
 tags: pullup

 We have some reason to believe Microsoft and Heimdal are both using
 the authdata value 142 for different purposes, leading to failures in
 verify_ad_signedpath().  For better interoperability, treat such
 tickets as unsigned, rather than invalid.

https://github.com/krb5/krb5/commit/ee25bca8b9805a4a3ae805d3166b98fb4b20d6f2
Commit By: tlyu
Revision: 23809
Changed Files:
U   branches/krb5-1-8/src/kdc/kdc_authdata.c