29202eba1a
As found in Ie5d55b2a2d96a78b34d23cc6fbac62900a23fc37, the default for this is to issue "OPTIONS /" which is kind of a weird request. The Zuul hosts currently seem to return the main page content in response to a OPTIONS request, which probably isn't right. Make this more robust by just using "HEAD /" request. Change-Id: Ibbd32ae744af9c33aedd087a8146195844814b3f