
Polish commit 5ca687c9a6b5 had an accidental side-effect of changing the 'Sec-WebSocket-Key' header value to lowercase. This breaks connections since the value needs to be echoed unchanged in the "Sec-WebSocket-Accept" header. Fixes gh-27147
Polish commit 5ca687c9a6b5 had an accidental side-effect of changing the 'Sec-WebSocket-Key' header value to lowercase. This breaks connections since the value needs to be echoed unchanged in the "Sec-WebSocket-Accept" header. Fixes gh-27147