screendump: send the signal to the renamed process.

bin/screendump

@@ -43,8 +43,8 @@ start() {
 }
 
 stop() {
-    # Send a SIGTERM to ffmpeg to stop the screen dump
-    pkill -u sdump ffmpeg
+    # Send a SIGTERM to ffmpeg (running as "[sysdump]") to stop the screen dump
+    pkill -u sdump "[sysdump]"
     # Give ffmpeg time to finalize the file
     sleep 10
 }