pull up r20572 from trunk

pull up r20572 from trunk

 r20572@cathode-dark-space:  jaltman | 2008-07-23 11:04:26 -0400
 ticket: 5745
 tags: pullup

 This patch modifies the NIM Kerberos v5 plug-in to use the
 krb5_get_error_message() function to look up the error string
 if the call to krb5_get_init_creds_password() fails. If the call
 to krb5_get_error_message() fails, the caller will failover to
 the previous method of looking up a suitable error message based
 on the error code.

ticket: 5745
version_fixed: 1.6.4
status: resolved

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@20640 dc483132-0cff-0310-8789-dd5450dbe970