- if active, `file` realm size
- if active, `native` realm size
- if active, `ldap` realm size, whether SSL is used, load balance type used, user search used
- if active, `active_directory` realm size, whether SSL is used, load balance type used
`size` is scale estimation based on the local cache. Scales are: `small` (under 10 users), `medium` (under 50 users), `large` (under 250 users) and `x-large` (above 250 users).
Original commit: elastic/x-pack-elasticsearch@c6efb17aa4
084179f457