Link easytier-mini downloads and fix UDP admission test ordering (#2638)

README.md

@@ -71,6 +71,8 @@ cargo install --git https://github.com/EasyTier/EasyTier.git easytier
 
 [Install pre-built binary](https://github.com/EasyTier/EasyTier/releases) (Recommended, All platforms supported)
 
+For a smaller executable, try [easytier-mini](https://github.com/EasyTier/easytier-mini), which supports basic TCP/UDP networking. See its documentation for supported features and usage.
+
 [Install via Docker](https://easytier.cn/en/guide/installation.html#installation-methods)
 
 [Install OpenWrt ipk package](https://github.com/EasyTier/luci-app-easytier)

README_CN.md

@@ -71,6 +71,8 @@ cargo install --git https://github.com/EasyTier/EasyTier.git easytier
 
 [下载预编译文件](https://github.com/EasyTier/EasyTier/releases)（推荐，支持所有平台）
 
+需要更小的可执行文件，可使用 [easytier-mini](https://github.com/EasyTier/easytier-mini)：支持基础 TCP/UDP 组网，功能范围与使用方式见其文档。
+
 [通过 Docker 安装](https://easytier.cn/guide/installation.html#%E5%AE%89%E8%A3%85%E6%96%B9%E5%BC%8F)
 
 [安装 OpenWrt ipk 软件包](https://github.com/EasyTier/luci-app-easytier)

easytier-contrib/easytier-mini/README.md

@@ -6,6 +6,11 @@ dynamic IPv4 allocation, the smoltcp userspace path and STUN/UDP hole-punching
 core with the full binary. It includes AES-GCM so its default encryption
 setting interoperates with the full binary's default configuration.
 
+Download [pre-built binaries](https://github.com/EasyTier/easytier-mini/releases)
+from the separate [easytier-mini repository](https://github.com/EasyTier/easytier-mini),
+which handles builds and releases. The source code is maintained here in the
+main EasyTier repository.
+
 Build it with:
 
 ```sh

easytier-core/src/gateway/port_forward.rs

@@ -892,15 +892,8 @@ mod tests {
         response_tasks.insert(replacement.clone(), pending_response_task(replacement_slot));
         drop(admission_guard);
 
-        tokio::time::timeout(Duration::from_secs(1), async {
-            while clients.contains_key(&replacement) {
-                tokio::task::yield_now().await;
-            }
-        })
-        .await
-        .unwrap();
-        assert!(!response_tasks.contains_key(&replacement));
-
+        // Release the test's permit reference and wait for the full eviction;
+        // the client and response-task entries are removed separately.
         drop(replacement_client);
         let second_slot = tokio::time::timeout(Duration::from_secs(1), second)
             .await
@@ -908,6 +901,9 @@ mod tests {
             .unwrap()
             .unwrap();
 
+        assert!(!clients.contains_key(&replacement));
+        assert!(!response_tasks.contains_key(&replacement));
+
         drop(second_slot);
         tokio::task::yield_now().await;
         assert_eq!(slots.available_permits(), 1);