• Replace httplib::any / std::map<std::string, httplib::any> based res.user_data with a new type-safe UserData class that provides set() / get<T>() API by @yhirose (Fix #2416)
• Add parse_url utility function with UrlComponents struct for parsing URLs into scheme, host, port, path, and query components by @yhirose
• [cmake] Allow using pre-existing zstd::libzstd target if it already exists, useful for projects that bundle their own zstd by @crueter in #2390
• Add header parser and URL parser fuzzers for OSS-Fuzz coverage improvement by @DavidKorczynski in #2412