* Add locale spec with failing locale plus region check
* Use a more accurate locale when supplied by browser headers
Previously we were using a matching option which would use the first locale
available which matched the locale portion, even if a region was specified.
This changes to first try to find an exact match, and then fall back to the
region, and then fall back to the default.
* Clean up default_locale method
* Add request spec for host meta route returning xml
* Add routing spec for xrd routes
* Update well-known routes
* Move webfinger and host-meta actions to their own controllers
A request to `/test` would show the custom 404 page, but a request to
`/test.test` would return a 404 with an empty body.
This change ignores the format on incoming catch all route requests, so that the
html 404 page is returned on these requests.
