Patch - bug fix and removing old code

[Sean Dilda <se...@duke.edu>]

Let me know if there's a better way to submit patches to this project.


Attached is a small patch taken from managementnode/lib/.  It fixes a 
bug in utils.pm::check_connection().  The netstat check was only 
recognizing ssh connections that showed up with ::ffff: in front of 
their IPs for lab machines and not for other linux images.  This patch 
copies the fix for lab machines and uses it for all linux images.


In addition, this patch also removes some code that is now unused thanks 
to the OS modularization.   While figuring out what happened when linux 
machines are deployed, I lost some time delving into this unused code, 
so I thought it best to submit a patch removing it so that no one else 
gets confused.