krb5: new tag krb5-1.17-beta1

[Greg Hudson]

A new lightweight tag "krb5-1.17-beta1" has been created in the krb5
repository for the following commit:

commit a72932a9075a21c1f6ea1f877e4767ae52341c30
Author: Greg Hudson <ghudson at mit.edu>
Date:   Wed Oct 31 14:20:38 2018 -0400

    Update for krb5-1.17-beta1