This commit ensures that `ContentDisposition` parses attributes like "filename" and "filename*" in a case insensitive fashion, per RFC 6266. Closes gh-34383 Signed-off-by: Andras Dobrosi <dobrosi@gmail.com> [brian.clozel@broadcom.com: apply code conventions] Signed-off-by: Brian Clozel <brian.clozel@broadcom.com>