Hear what providers retire, and let a person approve, reject and delete (hq ADR 0230)

A provider now waits for a person before retiring more than three consumers
or half of what it holds, and deletes only when asked. The controller is that
person's way in: it keeps waiting and rejected sets as conditions, answers them
with retire approve|reject, lists and deletes retired consumers through the
provider's own tools on its machine, records each act in the hand-act log, and
probes for anything retired longer than thirty days (D11).

internal/link/standing.go

@@ -81,6 +81,10 @@ func ReadStanding(subject string, body []byte) (Standing, error) {
 // it lasts, so one dropped is replaced; a recovery is said once, and dropping it would leave status
 // naming a consumer that is fine. So a store that is away holds the message, as a report is held.
 func (s *Server) provisioner(ctx context.Context, m Control) {
+	if IsRetirement(m.Subject()) {
+		s.retirement(ctx, m)
+		return
+	}
 	if s.standings == nil {
 		// Delivered because the consumer's filter names it, with nothing here keeping it: taken,
 		// because handing it back would not give it anywhere to go.