In klist, display ticket server if different

If the ticket server differs from the credential server, display it as
an extra field.  This happens most commonly when the credential is
cached under the referral realm.

https://github.com/krb5/krb5/commit/f174919a600ab617a881500e3ead98ba9f49c62e
Author: Greg Hudson <ghudson@mit.edu>
Commit: f174919a600ab617a881500e3ead98ba9f49c62e
Branch: master
 src/clients/klist/klist.c |   41 +++++++++++++++++++++++++----------------
 src/tests/t_referral.py   |    4 ++--
 2 files changed, 27 insertions(+), 18 deletions(-)