chore: add logging for get tun name from fd

listener/sing_tun/server.go

@@ -158,6 +158,9 @@ func New(options LC.Tun, tunnel C.Tunnel, additions ...inbound.Addition) (l *Lis
 		if tunnelName, err := getTunnelName(int32(options.FileDescriptor)); err == nil {
 			tunName = tunnelName // sing-tun must have the truth tun interface name even it from a fd
 			forwarderBindInterface = true
+			log.Debugln("[TUN] use tun name %s for fd %d", tunnelName, options.FileDescriptor)
+		} else {
+			log.Warnln("[TUN] get tun name failed for fd %d, fallback to use tun interface name %s", options.FileDescriptor, tunName)
 		}
 	}
 	routeAddress := options.RouteAddress