Change default of password_encryption to scram-sha-256
Also, the legacy values on/true/yes/1 for password_encryption that
mapped to md5 are removed. The only valid values are now
scram-sha-256 and md5.
Reviewed-by: Jonathan S. Katz <jkatz@postgresql.org>
Discussion: https://www.postgresql.org/message-id/flat/
d5b0ad33-7d94-bdd1-caac-
43a1c782cab2%402ndquadrant.com