
s3token middleware only allows configuring host and port for the auth URI. This doesn't allow the auth server to be on a path. A new auth_uri config option is added that allows the deployer to specify the full URL for auth. This overrides auth_host, auth_port, and auth_protocol. auth_host, auth_port, and auth_protocol are deprecated. DocImpact Change-Id: I1fe13f0365ca4704717fe680a0c8f54c64a9f06c