module Net::SSH::BufferedIo

def send_pending

data was sent, and +false+ otherwise.
Sends as much of the pending output as possible. Returns +true+ if any 
def send_pending
  if output.length > 0
    sent = send(output.to_s, 0)
    debug { "sent #{sent} bytes" }
    output.consume!(sent)
    return sent > 0
  else
    return false
  end
end