gnu-social/socialfy-your-domain/dot-well-known/host-meta

<?xml version="1.0" encoding="UTF-8"?><XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0" xmlns:hm="http://host-meta.net/xrd/1.0"><hm:Host>example.com</hm:Host><Link rel="lrdd" template="http://example.com/xrd?uri={uri}"><Title>Resource Descriptor</Title></Link></XRD>