This change renames --admin to --with-admin, --role to --member-of,
and --member to --with-member. Many people found the previous
names to be confusing. The --admin and --member options are new in
v16, but --role has been there for a while, so that one has been
kept (but left undocumented) for backward compatibility.
Suggested-by: Peter Eisentraut Reviewed-by: Tom Lane, Michael Paquier
Discussion: https://postgr.es/m/ZFvVZvQDliIWmOwg%40momjian.us