Draft: add radvd runscript
2024-10-26_15:39:21.02920 invoke-run: Starting radvd...
2024-10-26_15:39:21.03126 config file, /etc/radvd.conf, syntax ok
2024-10-26_15:39:21.03166 /usr/sbin/radvd --nodaemon --username radvd --logmethod stderr_clean --config /etc/radvd.conf --pidfile /var/run/radvd/radvd.pid
2024-10-26_15:39:21.03652 version 2.19 started