1998 CNRI license compatibility

[John Reuning]

I'm interested in updating the very old kerberos extension module.
However, the code dates to 1998 and is licensed under what appears to be
a pre-python-1.6 CNRI license.  Does anyone have recommendations on
whether additions and changes to the old code can be licensed under a
newer OSI-approved license?  There is information on GPL, CNRI 1.6, and
python license compatibility, as well as a history of the python
licenses in the current python license file.  But I can't find
suggestions on what to do with such an old version of the CNRI license.

http://www.python.org/ftp/python/contrib-09-
Dec-1999/System/krb5module-0.1.tar.gz
http://www.python.org/ftp/python/contrib-09-
Dec-1999/System/krb5module.README

Any ideas will be appreciated.

Many thanks,

-John R.