SSH config

Host *
        ForwardAgent            yes
        ForwardX11              yes
        ForwardX11Trusted       yes
        Protocol                2
        ServerAliveInterval     10
        ServerAliveCountMax     9
        PubkeyAcceptedKeyTypes  +ssh-dss

        # Sierra is recording SSH passphrases in "not the keychain"
        # https://discussions.apple.com/thread/7684132

        UseKeychain             no
        AddKeysToAgent          yes