(NEED FLEXISIP 2.5) App extension - usage de stop async et iterate pour terminer l'envoi d'imdn dés que possible
Use core.stopAsync with a looping iterate in app extension. This will allow the app extension to wait for the necessary data to be able to send IMDNs, and then exit cleanely as soon as it is done. If used with a flexisip 2.4 or older, there will always be a delay configured by the config section: 'misc', key: 'delay_message_send_s' before the IMDN gets sent and the notification is displayed