Revives and rebases #1809 by @tosticated (Jim Blankendaal) onto 3.3dev. When --phone-out is set, run_hsts now queries https://hstspreload.org/api/v2/status and reports whether the domain is on the browser HSTS preload list (preloaded/pending/rejected/unknown), cross-referenced with the served header, the same-domain check and the bulk flag.
Addresses the review comments on #1809: the API-response matching uses native bash string matching instead of forking grep, the JSON quoting is handled inside check_hsts_preloadlist_match() so callers pass plain values, and the value arrays use 'local -a'. The output decision table is kept as-is (per maintainer feedback). Adds t/53_hsts_preload.t. Original design and decision table by @tosticated.
Dirk Wetter