load_index
db = load_index(dbfile, &db_attr);
db = load_index(dbfile, &db_attr);
CA_DB *load_index(const char *dbfile, DB_ATTR *dbattr);
rdb = load_index(ridx_filename, NULL);
CA_DB *newrdb = load_index(ridx_filename, NULL);
db = load_index(srpvfile, NULL);
db = load_index(indexfile, NULL);