Prior to this change some tests that rely on nghttpx proxy did not use CRLF headers everywhere. A recent change in nghttp2, which updated its version of llhttp (HTTP parser), requires curl's HTTP/1.1 test server to use CRLF headers. Ref: https://github.com/nghttp2/nghttp2/commit/9d389e8 Fixes https://github.com/curl/curl/issues/9364 Closes https://github.com/curl/curl/pull/9365
