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Repro:a response carryingTransfer-Encoding: identityxon a normal (no--tr-encoding) transfer is accepted and the body delivered, instead of being rejected.Cause:Curl_build_unencoding_stack()matches the unsolicited-coding exceptionidentitywith a barecurl_strnequal(name, "identity", 8), a prefix compare, so any token starting withidentityslips past theCURLE_BAD_CONTENT_ENCODINGthat every other non-chunkedcoding hits. Thechunkedtoken just above is already length-checked withnamelen == 7.Fix:requirenamelen == 8for the identity match, mirroring thechunkedcheck.Test
2119.