I agree it's time to drop krb4 support. As far as I can tell tzc is totally abandoned upstream. chat/zephyr I believe MIT is still using zephyr, and that it's been using krb5 for a long time. So I think that should be updated instead. So feel free to mark BROKEN="no krb4 support in pkgsrc", or I can, pending an update to more modern zephyr.
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