Thread: pgsql: Invalidate acl.c caches when pg_authid changes.

Invalidate acl.c caches when pg_authid changes.

This makes existing sessions reflect "ALTER ROLE ... [NO]INHERIT" as
quickly as they have been reflecting "GRANT role_name".  Back-patch to
9.5 (all supported versions).

Reviewed by Nathan Bossart.

Discussion: https://postgr.es/m/20201221095028.GB3777719@rfd.leadboat.com

Branch
------
REL_13_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/9f8a48bb2c0e5d6557d78d7cce34444b249fbead

Modified Files
--------------
src/backend/utils/adt/acl.c              | 9 ++++++---
src/test/regress/expected/privileges.out | 7 +++++++
src/test/regress/sql/privileges.sql      | 6 ++++++
3 files changed, 19 insertions(+), 3 deletions(-)