Make a second sigint terminate immediately

Right now, sending a sigint will start a graceful shutdown, which can take quite a while.
By calling stop() in the signal handler it unregisters the handler so that a subsequent
sigint received during a graceful shutdown will kill the process immediately.

Signed-off-by: Ian Fox <code@whatthefox.dev>

main.go

@@ -20,6 +20,8 @@ func main() {
 		<-ctx.Done()
 		// Perform cleanup or graceful shutdown here
 		logger.L().StopError("Received interrupt signal, exiting...")
+		// Clear the signal handler so that a second interrupt signal shuts down immediately
+		stop()
 	}()
 
 	if err := cmd.Execute(ctx); err != nil {