Readonlylistings$Every listing, best first, replayed to new subscribers and re-emitted at most every throttleMs while reports stream in.
The listings as of now, best first.
Listings whose address matches what the person typed, best first.
Optionallimit: numberOpen the streaming subscription. Does nothing when already open.
Close it, keeping what was learned.
Servers to suggest for a purpose: the well-known fallback first, unless monitors say it refuses, then durable hosts from the directory.
A live directory of monitored servers.