JSch: Fix SSH conn fail if ConnectTimeout too low

JSch expects ConnectTimeout to be in milliseconds, but OpenSSH specifies
that it should be in seconds, so we need to convert the value after it
is read from the OpenSSH config file.

Fixes #439

ChangeLog.md

@@ -39,6 +39,11 @@ NullPointerException if a cipher algorithm supported by the SSH server but not
 by the SSH client was specified using the `Ciphers` OpenSSH config file
 keyword.
 
+9. Fixed an issue in the TurboVNC Viewer's built-in SSH client whereby the SSH
+connection timeout specified using the `ConnectTimeout` OpenSSH config file
+keyword was interpreted as milliseconds rather than seconds.  This caused the
+SSH connection to fail if the timeout was too low.
+
 
 3.1.3
 =====

java/com/jcraft/jsch/OpenSSHConfig.java

@@ -1,7 +1,7 @@
 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
 /*
 Copyright (c) 2013-2018 ymnk, JCraft,Inc. All rights reserved.
-Copyright (c) 2019, 2023 D. R. Commander. All rights reserved.
+Copyright (c) 2019, 2023, 2025 D. R. Commander. All rights reserved.
 Copyright (c) 2020-2021 Jeremy Norris. All rights reserved.
 Copyright (c) 2021 Matthias Wiedemann. All rights reserved.
 
@@ -157,6 +157,19 @@ else if(key_value[0].equalsIgnoreCase("ServerAliveInterval")){
         }
         kv.addElement(key_value);
       }
+      else if(key_value[0].equalsIgnoreCase("ConnectTimeout")){
+        int connectTimeout = -1;
+        try {
+          connectTimeout = Integer.parseInt(key_value[1]);
+        }
+        catch(NumberFormatException e){
+          // wrong format
+        }
+        if(connectTimeout>=0){
+          key_value[1]=Integer.toString(connectTimeout*1000);
+        }
+        kv.addElement(key_value);
+      }
       else {
         kv.addElement(key_value);
       }