[tor-relays] using Arm to manage nodes

[Damian Johnson]

Hi Jason. Yup, I've seen this as well. I'm hoping that the regression
came in with the interpretor panel, which caused some other confusing
side effects as well...

https://trac.torproject.org/6439

Unfortunately this issue doesn't have a good, reliable repro besides
'wait for a week and see if it happens' so I'm not yet sure if this
addressed the issue or not.

Cheers! -Damian (arm's author)