/etc/rkhunter.conf
might be the file that you want to change for this?
E.g.:
# MDO, 18.6.06 changed to 1 to allow ssh root access
ALLOW_SSH_ROOT_USER=1
It looks to me that this file is NOT created as a template, instead it comes from the rpm (rkhunter-1.2.7-1sme07). If you edit/change it, it might be overwritten with a next program/version update for rkhunter.
Michael