New testing release.
- [enh] Make use of call_async_output in hook_exec to get output in real time
- [fix] Display a more detailed message when yunohost-firewall is stopped
- [fix] Prevent insserv warning when using systemd at package postinst
- [fix] Log real exception string error in hook_callback
- [fix] Add yunohost-firewall.service but do not enable it
- [fix] Log for rmilter instead of rspamd
- [fix] Do not exit at first service which can't be stopped