For when we have multiple active API versions, we have code to redirect
from one running API server to another. Right now, we've disabled the
beta/legacy API server and haven't released a V2 yet, so we currently
have no proxying configured.
Right now the default with no configuration is to simply return an
error. However that means that request to http://search.mapzen.com/
return that unfriendly error. We have a nice friendly /v1 page, so in
the case of no proxy being set up, it makes sense to redirect to that.