At the moment the kea recipe only installs systemd service files, but we also need to support the sysvinit variant.
patch sent. https://patchwork.openembedded.org/patch/177220/
issues found. have a bit more work.
busybox and fixed kea changes sent to list
in master: http://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=d4ecc90268438900ccbef6020cdb15c054fb4027