Bug#567708: openssh: FTPFS with heimdal < 1.3.0
I'll fix this upstream, I think the best thing to do is to have a configure test for krb5_free_unparsed_name, and use krb5_xfree if it's not available.
However, I'm a little concerned that when Love added the new function, he's marked it deprecated. I've emailed him to find out if there's something that should be used instead.
However, if I don't get to this in time for your release schedule, using krb5_xfree on Heimdal will be fine.