Ignore motd output instead of including in parse

[boombatower]

If one has a system wide motd configured everything breaks. I disabled for root which allowed me to use machinery, but seems a bit sub-optimal. I did not dig into the ssh setup to see if such a change would be possible.

[termdew]

motd could suppressed by using the SSH option -q, but this also suppresses possible error messages, which are actually needed to show appropiate error messages instead of just giving a backtrace to the user.