radvd package does not add radvd:radvd
gateway:~# chown -R radvd:radvd /etc/radvd.conf
chown: unknown user/group radvd:radvd
gateway:~# /etc/init.d/radvd start
* checkpath: owner `radvd:radvd’ not found
* ERROR: radvd failed to start
The APORT should be updated to fix this issue.
(from redmine: issue id 4771, created on 2015-10-16, closed on 2017-05-17)