+/* external functions in db.c */
+int db_copy_in(DB **mdb, const char *dbname, const char *name,
+ BTREEINFO *bti, int (*v1_to_v2)(DBT *key, DBT *data));
+int db_copy_out(DB *mdb, const char *dbname, const char *name,
+ BTREEINFO *bti);
+void db_destroy(DB *db, const char *uname);
+