Apply dn_parent memory leak fix to bdb2

servers/slapd/back-bdb2/dn2id.c

@@ -58,6 +58,7 @@ bdb2i_dn2id_add(
 			sprintf( key.dptr, "%c%s", DN_ONE_PREFIX, pdn );
 			rc = bdb2i_idl_insert_key( be, db, key, id );
 			free( key.dptr );
+			free( pdn );
 		}
 	}