// Shutdown will release other resources and halt the server.
func (srv *Server) Shutdown() {
srv.ImageEngine.Terminate()
srv.DB.Close()
srv.Chainstore.Close()
lg.Info("server shutdown.")
}
// Close signals to the server that should deny new requests
// and finish up requests in progress.
func (srv *Server) Close() {
lg.Info("closing server..")
srv.CancelFunc()
}