These patches have been split off the now deprecated monolithic "Delegating superuser tasks to new security roles" thread at [1].
The purpose of these patches is to fix the CREATEROLE escalation attack vector misfeature. (Not everyone will see CREATEROLE that way, but the perceived value of the patch set likely depends on how much you see CREATEROLE in that light.)
v1-0001-Add-tests-of-the-CREATEROLE-attribute.patch
Description: Binary data
v1-0002-Add-owners-to-roles.patch
Description: Binary data
v1-0003-Give-role-owners-control-over-owned-roles.patch
Description: Binary data
v1-0004-Restrict-power-granted-via-CREATEROLE.patch
Description: Binary data
[1] https://www.postgresql.org/message-id/flat/F9408A5A-B20B-42D2-9E7F-49CD3D1547BC%40enterprisedb.com — Mark Dilger EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company