The existing set of kerberos credential used deprecated algorithms
which are not supported by some implementations in FIPS mode.
Regenerate the saved credentials using more modern algorithms.
Added tsiggss/krb/setup.sh which sets up a test KDC with the required
principals for the system test to work. The tsiggss system test
needs to be run once with this active and KRB5_CONFIG appropriately.
set. See tsiggss/tests.sh for an example of how to do this.
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