v0.35.1: performance, AGPL licensing and documentation overhaul

- Web Server reads static files inline; proxy middleware chain flattened
- About window with license summary and project links; AGPL-3.0-or-later
- Rewritten documentation: feature list, screenshots, performance guide
- Fix false spikes in per-Vhost request-rate charts

src/proxy/forward_entry.rs

@@ -1,7 +1,7 @@
 async fn forward(
-    State(state): State<Arc<App>>,
-    Extension(peer): Extension<PeerAddr>,
-    Extension(local): Extension<LocalAddr>,
+    state: Arc<App>,
+    peer: PeerAddr,
+    local: LocalAddr,
     mut request: Request,
 ) -> Response {
     let cookies = crate::auth_provider::CookieSink::default();
@@ -279,7 +279,7 @@ async fn forward_request(
             country.as_deref(),
             request
                 .headers()
-                .get(http::header::USER_AGENT)
+                .get(::http::header::USER_AGENT)
                 .and_then(|value| value.to_str().ok()),
             &snapshot.global_security.rate_limit,
         ) {
@@ -288,7 +288,7 @@ async fn forward_request(
                 "RustProxy: global request rate limit exceeded\n",
             );
             if let Ok(value) = HeaderValue::from_str(&limited.retry_after_seconds.to_string()) {
-                response.headers_mut().insert("retry-after", value);
+                response.headers_mut().insert(::http::header::RETRY_AFTER, value);
             }
             return response;
         }
@@ -335,7 +335,7 @@ async fn forward_request(
                 country.as_deref(),
                 request
                     .headers()
-                    .get(http::header::USER_AGENT)
+                    .get(::http::header::USER_AGENT)
                     .and_then(|value| value.to_str().ok()),
                 &frontend.rate_limit,
             ) {
@@ -344,7 +344,7 @@ async fn forward_request(
                     "RustProxy: request rate limit exceeded\n",
                 );
                 if let Ok(value) = HeaderValue::from_str(&limited.retry_after_seconds.to_string()) {
-                    response.headers_mut().insert("retry-after", value);
+                    response.headers_mut().insert(::http::header::RETRY_AFTER, value);
                 }
                 return response;
             }