#23 Test suite not depending on Internet connectivity

[Magnus Holmgren]

It would be nice if you could let policy.t and public_key.t share the "fake DNS" in verifier.t, such that the test suite doesn't depend on the Internet being available.

(The build environment on Debian's autobuilders doesn't provide network connectivity, and anyway, Internet connections fail now and then and I don't think that should cause unit tests to fail.)