Symptoms
'ssh -o HostKeyAlgorithms=+ssh-dss' fails, and does not enable ssh-dss.
Impact
ssh-dss can't be enabled with the '+alg' syntax.
Conditions
-- ssh-dss is disabled
-- attempt to enable ssh-dss in an ssh command using the '+alg' syntax
Workaround
Use the syntax '-o HostKeyAlgorithms=ssh-dss' instead.
