__bt_relink
if (__bt_relink(t, pg) || __bt_free(t, pg))
return (__bt_relink(t, h) || __bt_free(t, h));
int __bt_relink(BTREE *, PAGE *);
if (__bt_relink(t, h) != 0) {
extern int __bt_relink(BTREE *, PAGE *);