Update quinn-proto/src/crypto/rustls.rs

Co-Authored-By: Demi Obenour <[email protected]>

quinn-proto/src/crypto/rustls.rs

@@ -167,7 +167,10 @@ pub struct AuthenticationData {
     /// For clients, this is the certificate chain of the server. For servers, this is the
     /// certificate chain of the client, if client authentication was completed.
     ///
-    /// None if this data was requested from the session before this value is available.
+    /// `None` if this data was requested from the session before this value is available.
+    ///
+    /// If this returns `None`, and `Connection::is_handshaking` returns `false`, the connection
+    /// will have already been closed.
     pub peer_certificates: Option<CertificateChain>,
     /// The negotiated application protocol
     pub protocol: Option<Vec<u8>>,