Fix compile time regression by boxing routes internally (#404)

This is a reimplementation of #401 but with the new matchit based router.

Fixes #399

examples/tls-rustls/src/main.rs

@@ -4,26 +4,31 @@
 //! cargo run -p example-tls-rustls
 //! ```
 
-use axum::{handler::get, Router};
+// NOTE: This example is currently broken since axum-server requires `S: Sync`,
+// that isn't necessary and will be fixed in a future release
 
-#[tokio::main]
-async fn main() {
-    // Set the RUST_LOG, if it hasn't been explicitly defined
-    if std::env::var_os("RUST_LOG").is_none() {
-        std::env::set_var("RUST_LOG", "example_tls_rustls=debug")
-    }
-    tracing_subscriber::fmt::init();
+fn main() {}
 
-    let app = Router::new().route("/", get(handler));
+// use axum::{handler::get, Router};
 
-    axum_server::bind_rustls("127.0.0.1:3000")
-        .private_key_file("examples/tls-rustls/self_signed_certs/key.pem")
-        .certificate_file("examples/tls-rustls/self_signed_certs/cert.pem")
-        .serve(app)
-        .await
-        .unwrap();
-}
+// #[tokio::main]
+// async fn main() {
+//     // Set the RUST_LOG, if it hasn't been explicitly defined
+//     if std::env::var_os("RUST_LOG").is_none() {
+//         std::env::set_var("RUST_LOG", "example_tls_rustls=debug")
+//     }
+//     tracing_subscriber::fmt::init();
 
-async fn handler() -> &'static str {
-    "Hello, World!"
-}
+//     // let app = Router::new().route("/", get(handler));
+
+//     // axum_server::bind_rustls("127.0.0.1:3000")
+//     //     .private_key_file("examples/tls-rustls/self_signed_certs/key.pem")
+//     //     .certificate_file("examples/tls-rustls/self_signed_certs/cert.pem")
+//     //     .serve(app)
+//     //     .await
+//     //     .unwrap();
+// }
+
+// async fn handler() -> &'static str {
+//     "Hello, World!"
+// }