Enhance mappings of NTSTATUS to KRB5KDC errors.

Enhance mappings of NTSTATUS to KRB5KDC errors.

The enhanced mappings allow the Windows client to determine whether a user's
password needs to be changed (and allows them to change it), or if they cannot
logon at all.

Changes still need to be made to allow additional data to be returned.  Windows
uses that additional data to display more detailed dialogs to the user.  The
additional information is returned in an e-data struct of type PA-PW-SALT that
contains the more-detailed NTSTATUS error code.
(This used to be commit 6a98e5a7aa0cdbb61358901df50162b5b914ee5c)