Trying to test @miconda's commits on top of the 5.3 branch--can't get Kamailio to notify systemd on startup. strace doesn't show anything attempting to send notification to systemd. I'll keep trying...
Looking through `main.c`, I think this is because `sr_corecb_void_exec(app_ready);` is not included in `if (dont_fork)`. The assumption with `Type=notify` is that we'd be using `kamailio -DD` where the main process isn't forked, correct?