update_lookup_map
err = update_lookup_map(skel->maps.redir_map, i,
err = update_lookup_map(skel->maps.redir_map, SERVER_A, connected_fd);
err = update_lookup_map(t->redir_map, SERVER_A, server_fd);
err = update_lookup_map(t->sock_map, i, server_fds[i]);
err = update_lookup_map(t->sock_map, SERVER_A, server1);