Minor bug prevented requests from legacy domains

During the course of a slow rollout of a newly rewritten authentication component, the software was deployed with an unintended bug which prevented the usual proxying of requests to the intended back-end service. The cause of the failure is due to an oversight on our part to register an old/legacy domain names still in use by affected customers (autocomplete-api.smartystreets.com as well as extract-beta.api.smartystreets.com). We have since re-added support for these domains and will continue with our slow rollout. Customers should update to the canonical hostnames for respective services (us-autocomplete.api.smartystreets.com and us-extract.api.smartystreets.com).