Isn't this missing support in pg_dumb ?
- PostgreSQL shutdown modes Robert Haas
- Re: PostgreSQL shutdown modes Justin Pryzby
- Re: PostgreSQL shutdown modes Michael Paquier
- Re: PostgreSQL shutdown modes Rushabh Lathia
- Re: PostgreSQL shutdown modes Kyotaro Horiguchi
- Re: PostgreSQL shutdown modes chap
- Re: PostgreSQL shutdown modes Robert Haas