fix(ConnectionHandler/tls): Change the TLS alert sent when a ClientHello lacks SNI: use the close_notify alert instead of handshake_failure to prompt immediate retry with SNI.

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '4.1.7',
+  version: '4.1.8',
   description: 'A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.'
 }

ts/classes.pp.connectionhandler.ts

@@ -595,10 +595,20 @@ export class ConnectionHandler {
               0x28, // handshake_failure alert (40) instead of unrecognized_name (112)
             ]);
 
+            const closeNotifyAlert = Buffer.from([
+              0x15, // Alert record type
+              0x03,
+              0x03, // TLS 1.2 version
+              0x00,
+              0x02, // Length
+              0x01, // Warning alert level (1)
+              0x00, // close_notify alert (0)
+            ]);
+
             try {
               // Use cork/uncork to ensure the alert is sent as a single packet
               socket.cork();
-              const writeSuccessful = socket.write(sslHandshakeFailureAlertData);
+              const writeSuccessful = socket.write(closeNotifyAlert);
               socket.uncork();
 
               // Function to handle the clean socket termination