The cookie-database aggregator backstop normalised the agent's
third-party name and looked it up against bare brand keys, but
normalizeAlnum folds the eTLD into the key (cookiedatabase.org ->
cookiedatabaseorg). Domain- and URL-form attributions therefore
slipped past the exact lookup, letting noisy aggregator names be
accepted instead of discarded.
Add uri.DomainLabel to reduce a host-like string to its primary
registrable label and check it alongside the normalised name, so
both brand ("Cookiepedia") and domain forms ("cookiedatabase.org",
"https://www.cookiepedia.co.uk/list") resolve to the same key.
Signed-off-by: Émile Ré <emile@probo.com>
ae61c20791