Pelican's current main branch shows that the Director.EnableStat param is deprecated:
name: Director.EnableStat
description: |+
Before redirecting a cache (or, for direct reads or writes, a client) to an origin,
query the origin to see if the object is present.
Enabling this option generates slightly more load on the origin; however, it provides
improved error messages and allows a namespace to effectively be split across multiple
origins.
type: bool
default: true
deprecated: true
hidden: true
replacedby: Director.CheckOriginPresence
components: ["director"]
But the docs website doesn't indicate this
