Single-bug release. Unblocks x.com browsing for users whose browsers
resolve to www.x.com rather than bare x.com — i.e. essentially
everyone using Firefox / Chrome / Safari.
Previous releases still advertised the URL-truncation fix as working
but it only matched exact Host: x.com, which never happens in real
traffic. v1.2.11 widens the matcher to x.com + *.x.com so www.x.com,
api.x.com, and any future x.com subdomain all get the shortened URL
through Apps Script's URL length cap.