I just took a fresh look at / compiled this patch, and it all works as advertised. My one minor nit is this hint:
HINT: Refer to the PostgreSQL documentation for details about migrating to another password type.
We don't really have that in the docs, as near as I can tell, the closest is 20.5 which says "make all users set new passwords, and change the authentication method specifications in pg_hba.conf to scram-sha-256." Maybe that's enough?
Cheers,
Greg
