I'm trying to use he sftp kioslave to access an account through a proxy:

    Host intermediate
    HostName intermediate.example.or
    User me

    Host destination
    HostName destination.example.org
    User me
    ProxyCommand ssh -q -W %h:%p intermediate

`sftp destination` works, but sftp://destination results in:

Protocol mismatch: Bad stdio forwarding specification 'destination.example.org:0'

`sftp intermediate` and sftp://intermediate both work, so I think it has to do with using ProxyCommand.

I'm using libssh-0.6.5.

Reproducible: Always