Fix server hangup (#206)

CHANGELOG.md

@@ -11,6 +11,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - `Request` and `Response` types from `distant-net` now support an optional
   `Header` to send miscellaneous information
+- New feature `tracing` provides https://github.com/tokio-rs/tracing support
+  as a new `--tracing` flag. Must be compiled with
+  `RUSTFLAGS="--cfg tokio_unstable"` to properly operate.
 
 ### Changed
 
@@ -21,6 +24,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `DistantApi` now handles batch requests in parallel, returning the results in
   order. To achieve the previous sequential processing of batch requests, the
   header value `sequence` needs to be set to true
+- Rename `GenericServerRef` to `ServerRef` and remove `ServerRef` trait,
+  refactoring `TcpServerRef`, `UnixSocketServerRef`, and `WindowsPipeServerRef`
+  to use the struct instead of `Box<dyn ServerRef>`
 
 ## [0.20.0-alpha.8]
 

distant-auth/src/methods/none.rs

@@ -5,11 +5,13 @@ use async_trait::async_trait;
 use crate::authenticator::Authenticator;
 use crate::methods::AuthenticationMethod;
 
-/// Authenticaton method for a static secret key
+/// Authenticaton method that skips authentication and approves anything.
 #[derive(Clone, Debug)]
 pub struct NoneAuthenticationMethod;
 
 impl NoneAuthenticationMethod {
+    pub const ID: &str = "none";
+
     #[inline]
     pub fn new() -> Self {
         Self
@@ -26,7 +28,7 @@ impl Default for NoneAuthenticationMethod {
 #[async_trait]
 impl AuthenticationMethod for NoneAuthenticationMethod {
     fn id(&self) -> &'static str {
-        "none"
+        Self::ID
     }
 
     async fn authenticate(&self, _: &mut dyn Authenticator) -> io::Result<()> {

distant-auth/src/methods/static_key.rs

@@ -14,6 +14,8 @@ pub struct StaticKeyAuthenticationMethod<T> {
 }
 
 impl<T> StaticKeyAuthenticationMethod<T> {
+    pub const ID: &str = "static_key";
+
     #[inline]
     pub fn new(key: T) -> Self {
         Self { key }
@@ -26,7 +28,7 @@ where
     T: FromStr + PartialEq + Send + Sync,
 {
     fn id(&self) -> &'static str {
-        "static_key"
+        Self::ID
     }
 
     async fn authenticate(&self, authenticator: &mut dyn Authenticator) -> io::Result<()> {