update to latest go.crypto/ssh
update to latest go.crypto/ssh

The API for go.crypto/ssh changed a lot. See [1] for details.

[1] https://groups.google.com/forum/#!msg/Golang-nuts/AoVxQ4bB5XQ/i8kpMxdbVlEJ

rajthilakmca/urknall,megamsys/urknall,dynport/urknall