pull up r22397 from trunk

pull up r22397 from trunk

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 r22397 | ghudson | 2009-06-01 18:39:31 -0400 (Mon, 01 Jun 2009) | 17 lines

 ticket: 6506
 subject: Make results of krb5_db_def_fetch_mkey more predictable
 tags: pullup
 target_version: 1.7

 krb5_db_def_fetch_mkey tries the stash file as a keytab, then falls
 back to the old stash file format.  If the stash file was in keytab
 format, but didn't contain the desired master key, we would try to
 read a keytab file as a stash file.  This could succeed or fail
 depending on byte order and other unpredictable factors.  The upshot
 was that one of the libkadm5 unit tests (init 108) was getting a
 different error code on different platforms.

 To fix this, only try the stash file format if we get
 KRB5_KEYTAB_BADVNO trying the keytab format.  This requires reworking
 the error handling logic.

ticket: 6506
status: resolved

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-7@22795 dc483132-0cff-0310-8789-dd5450dbe970