- hostgroups: computers, service, kvmdomains, jessie, hassrvfs, apache2-hosts, heavy-exim, postgres94-hosts, hasvarlogfs, apache-https, spamd, nfs-server, systemd-timesyncd
+ hostgroups: computers, service, kvmdomains, stretch, hassrvfs, apache2-hosts, heavy-exim, postgres96-hosts, hasvarlogfs, apache-https, spamd, nfs-server, systemd-timesyncd