Fix watchdog daemonization with setsid

- Use setsid to properly daemonize main() function
- setsid bash -c 'main' & creates independent process group
- Prevents main() from being killed when parent script exits
- Fixed both wssshd and wssshc watchdogs
- Watchdog processes should now persist correctly

wsssh-server/debian/wssshd-watchdog

@@ -260,8 +260,8 @@ case "$1" in
         fi
         echo "Calling main() function..."
 
-        # Run main() in background and don't wait for it
-        main &
+        # Properly daemonize the main() function
+        setsid bash -c 'main' &
 
         # Give it a moment to start
         sleep 1

wssshtools/debian/wssshc-watchdog

@@ -255,8 +255,8 @@ case "$1" in
         fi
         echo "Calling main() function..."
 
-        # Run main() in background and don't wait for it
-        main &
+        # Properly daemonize the main() function
+        setsid bash -c 'main' &
 
         # Give it a moment to start
         sleep 1