Allow proxying to any URL through the single-token auth path:
- /TOKEN/https://target.com/path
- /TOKEN/https:/target.com/path (browser-normalized)
- /TOKEN/target.com/path (auto-prefixed with https:// for known domains)
Also fix single-mode path handling that previously dropped
parts[2] when SplitN produced 3 parts.
via [HAPI](https://hapi.run)
Co-Authored-By: HAPI <[email protected]>
