Офигеть терминология в гугле. И пруфы аналитиков просто сыпятся.

https://go.googlesource.com/go/+/53fc330e2d154443acf3d01e0d6...

+// Shutdown gracefully shuts down the server without interrupting any
+// active connections. Shutdown works by first closing all open
+// listeners, then closing all idle connections, and then waiting
+// indefinitely for connections to return to idle and then shut down.
+// If the provided context expires before the shutdown is complete,
+// then the context's error is returned.
+func (s *Server) Shutdown(ctx context.Context) error {
+    atomic.AddInt32(&s.inShutdown, 1)
+    defer atomic.AddInt32(&s.inShutdown, -1)
+
+    s.mu.Lock()
+    lnerr := s.closeListenersLocked()
+    s.closeDoneChanLocked()
+    s.mu.Unlock()
+
+    ticker := time.NewTicker(shutdownPollInterval)
+    defer ticker.Stop()
+    for {
+        if s.closeIdleConns() {
+            return lnerr
+        }
+        select {
+        case <-ctx.Done():
+            return ctx.Err()
+        case <-ticker.C:
+        }
+    }
+}
+