session_open
if (session_open(the_authctxt, c->self) != 1) {
int session_open(Authctxt *, int);
bthid_session_p session_open (bthid_server_p srv, hid_device_p const d);
if ((s = session_open(srv, d)) == NULL) {
if ((s = session_open(srv, d)) == NULL) {