pull up r23819 from trunk

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 r23819 | ghudson | 2010-03-18 10:37:31 -0700 (Thu, 18 Mar 2010) | 7 lines

 ticket: 6683
 target_version: 1.8.1
 tags: pullup

 Fix the kpasswd fallback from the ccache principal name to the
 username in the case where the ccache doesn't exist.

https://github.com/krb5/krb5/commit/c0a71892c7c7a663722401c02d345081c98c1c30
Commit By: tlyu
Revision: 23826
Changed Files:
U   branches/krb5-1-8/src/clients/kpasswd/kpasswd.c