[sr-dev] [kamailio] add socket activation support (#293)

Having (optional) support for socket activation in Kamailio would bring several benefits: * Security: systemd can listen on privileged ports or socket paths and start Kamailio with privileges already dropped. * Major upgrades or reconfigurations of Kamailio requiring a full restart are possible without having the listening socket(s) ever go away. * Any service dependent on Kamailio doesn't have to wait for it to finish starting (or start at all). --- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/293