added public shutdown function for Frontend, so Pax elements can decide to terminate Pax. This is mainly useful for batch-style elements, but could also be used by other elements to shut Pax down in case of irrecoverable errors, say;
added public shutdown function for Frontend, so Pax elements can decide to terminate Pax. This is mainly useful for batch-style elements, but could also be used by other elements to shut Pax down in case of irrecoverable errors, say;

niksu/pax,niksu/pax,niksu/pax