SSH key support

[amitsnyderman]

Some folks might prefer to not store their password in cleartext.

[kersten]

+1

I would help here, but I am not the coffee god and don't want to mess the code ;)

Should only be something like this:

connection.connect
    host: hostname
    port: port
    username: username
    (keyfile) ? privateKey: require('fs').readFileSync(keyfile) ? password: password

[yongkangchen]

Already supported, I will close this issue.