multi: add shutdown logs in subservers

This commit adds a simple shutdown to every subserver to assist
debugging.

netann/chan_status_manager.go

@@ -217,6 +217,7 @@ func (m *ChanStatusManager) start() error {
 // Stop safely shuts down the ChanStatusManager.
 func (m *ChanStatusManager) Stop() error {
 	m.stopped.Do(func() {
+		log.Info("Channel Status Manager shutting down")
 		close(m.quit)
 		m.wg.Wait()
 	})

netann/host_ann.go

@@ -68,6 +68,7 @@ func (h *HostAnnouncer) Start() error {
 // Stop signals the HostAnnouncer for a graceful stop.
 func (h *HostAnnouncer) Stop() error {
 	h.stopOnce.Do(func() {
+		log.Info("HostAnnouncer shutting down")
 		close(h.quit)
 		h.wg.Wait()
 	})