CCI-MOC/haas — pull request #31 by zenhack (2014-03-10 08:17:49+00:00)
Title: Fixed #22

The colon character wasn't included in the set of characters accepting
in the mac address.

While there's precedent for this solution (see attach_headnode), I'm a
bit unhappy with it. The regex approach feels a bit clumsy to me,
particulary when we start adding exceptions like this to things.