Carrier for UPS

Initial release.
UPS through the OAuth REST APIs (Rating, Shipping, Void, Tracking, Locator, Pickup and Address Validation, version v2409), with sandbox (CIE) and production environments.
OAuth client-credentials authentication. Tokens are cached for the lifetime UPS reports and refreshed a minute early.
Live rates for one service or every service at once, with negotiated rates, transit days and estimated delivery dates. Shopped rates are limited to the services this package knows.
Labels as ZPL, or as PNG converted from UPS's GIF when PHP's GD extension is installed.
Multi-package shipments, with one tracking number and label per package.
Print Return Labels, with the parties swapped and one package per US/PR return.
International shipments, with the commercial invoice built from Carrier's customs lines and a choice of DDU or DDP.
Voids by the shipment's lead 1Z.
Tracking with full scan history mapped onto Carrier's statuses, the delivery date and who signed.
UPS Access Point search for the checkout picker, and hold-for-pickup delivery to the chosen point.
On-call pickups.
Address validation with suggested corrections and residential/commercial classification.
Signature, adult signature, Saturday delivery and residential delivery accessorials.

Version 5.0.0