pull up r23766 from trunk

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.

ticket: 6676
version_fixed: 1.8.1
status: resolved

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-8@23809 dc483132-0cff-0310-8789-dd5450dbe970