As of OpenSSH 6.9, support for `ssh-dss` host keys is disabled by default
at runtime. Specify an explicit `-o HostKeyAlgorithms` in the pkd tests
to explicitly enable each host key type being tested, including `ssh-dss`.
Signed-off-by: Jon Simons <jon@jonsimons.org>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>