- add alt-names for service addresses stalwart is expected to reply too
- add frontends for imap, imaps and smtp - add backends for webadmin, imap, imaps and smtp Reviewed-on: #420
- add stalwart module - add psql database on the shared patroni instance - add ceph-rgw credentials to eyaml - ensure psql pass and s3 access key are converted to sensitive Reviewed-on: #418
