config.txt: Postgres does not use auth files anymore.
config.txt: Postgres does not use auth files anymore.

Clarify documentation on the matter and hint how to
generate the file automatically.

digoal/pgbouncer-x2,kvap/pgbouncer,jaiminpan/pgbouncer,dbaxa/pgbouncer,wurenny/pgbouncer-x2,wurenny/pgbouncer-x2,jaiminpan/pgbouncer,jaiminpan/pgbouncer,kvap/pgbouncer,digoal/pgbouncer-x2,dbaxa/pgbouncer,dbaxa/pgbouncer,kvap/pgbouncer,kvap/pgbouncer,digoal/pgbouncer-x2,dbaxa/pgbouncer,digoal/pgbouncer-x2,wurenny/pgbouncer-x2,wurenny/pgbouncer-x2,jaiminpan/pgbouncer