fix(req): ignore trailing root dot in subdomains#7331
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This strips an optional trailing DNS root dot before calculating
req.subdomains, so fully qualified hostnames behave like their ordinary hostname form.The regression test covers
tobi.ferrets.example.com.and keeps existing subdomain offset behavior unchanged.Validation:
npx mocha --require test/support/env --check-leaks test/req.subdomains.jsnpm run lintgit diff --checkAI-assisted: Codex helped prepare this focused change; I reviewed the diff and ran the validation above before submitting.