Consider `sudo` transports

[alfredodeza]

Because we don't want to be cluttering all the commands that we are passing around with sudo (all our commands need sudo) we are currently doing something like this:

class SshSudoTransport(object):
    @staticmethod
    def Popen(command, *a, **kw):
        command = ['sudo'] + command
        return pushy.transport.ssh.Popen(command, *a, **kw)


pushy.transports['ssh+sudo'] = SshSudoTransport

Would you consider adding sudo transports to pushy ? We do this for ssh and for local commands as well, but for brevity I am showing the ssh one.

If so, I would be more than happy to send a pull request.

Thank you!

[axw]

@alfredodeza I've not had any requests for this, so not right now. I'll leave this open and revisit if enough (any?) others show interest. Right now I have no need for it, nor any time to test it. Thanks for the offer.