be more honest about test suite failures due to old libraries

[David Bremner]

Daniel Kahn Gillmor <dkg at fifthhorseman.net> writes:

> We have several places where tests are skipped or marked as though
> some test suite prereqs are missing, but in fact are due to building
> against older versions of libraries that don't support certain
> features.
>
> This series tries to be more honest about some of those tests by
> marking them as broken, rather than just skipping them.

pushed to master

d