It's weird to have such a provider-specific feature, particularly when
there are other reasonable workarounds:
* As a client, you can specify your own storage URL.
* As a provider, you can have a separate auth endpoint that only hands
out internal urls.
Change-Id: I1050c4f16786e1227793c0548423118657f64b79
Signed-off-by: Tim Burke <tim.burke@gmail.com>
dab0e5e55b