cURL and libcurl Drop Hyper Support

After a four-year experiment, the cURL project has announced it's abandoning the use of the Rust-based Hyper library as an HTTP backend. Despite Hyper's memory safety advantages and support from Let's Encrypt, lack of user demand and developer involvement led to its termination. The cURL team cited the high cost of maintaining the Hyper code and a focus on improving and maintaining the existing codebase. While the experiment failed, cURL gained valuable experience and improved its HTTP handling capabilities.