/ curl Public
h2h3: Fix bug overriding the 'TE: Trailers' header #9170
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A 'TE: Trailers' header is explicitly replaced by 'te: trailers'
(lowercase) in Curl_pseudo_headers() when building the list of HTTP/2
or HTTP/3 headers. However, this is then replaced again by the original
value due to a bug, resulting in the uppercased version being sent. Some
HTTP/2 servers reject the whole HTTP/2 stream when this is the case.