Comment 3 for bug 1046221

Tested and found ok, accepted patch here: http://nav.uninett.no/hg/stable/rev/a0fe815437b7

BUT, the code for the SshChecker code in total was butt-ugly and had multiple pylint violations, so I did some cleaning here, afterwards: http://nav.uninett.no/hg/stable/rev/b0983a8145fe