Re: making EXPLAIN extensible

I tried it out and felt good about this feature.
But I found that the following information is not very complete.

postgres=# select * from pg_get_loaded_modules();
 module_name  | version |     file_name     
--------------+---------+-------------------
              |         | pg_overexplain.so
 auto_explain | 18devel | auto_explain.so
 plpgsql      | 18devel | plpgsql.so
(3 rows)

Some minor changes may be needed.

// PG_MODULE_MAGIC;
PG_MODULE_MAGIC_EXT(
                    .name = "pg_overexplain",
                    .version = PG_VERSION
);