If ssh key not deployed on server, resulting pw prompt and script exit causes Mac xterm to stop rendering typed text.

[joshjriley]

If validate_ssh_key fails b/c key does not exist on server, it prompts for kvnc pass which times out in 5 seconds. When app exits on its own as a result, it results in my Mac term not displaying any typed text. Term still works though. Not sure if this is just an issue with my Mac xterm or any mac or linux xterm. My guess is something to do with needing to terminate the subprocess properly which is still waiting for text password input.