Revert MAINTAIN privilege and pg_maintain predefined role.
This reverts the following commits: 4dbdb82513
, c2122aae63
,
5b1a879943
, 9e1e9d6560
, ff9618e82a
, 60684dd834
, 4441fc704d
,
and b5d6382496
. A role with the MAINTAIN privilege may be able to
use search_path tricks to escalate privileges to the table owner.
Unfortunately, it is too late in the v16 development cycle to apply
the proposed fix, i.e., restricting search_path when running
maintenance commands.
Bumps catversion.
Reviewed-by: Jeff Davis
Discussion: https://postgr.es/m/E1q7j7Y-000z1H-Hr%40gemulon.postgresql.org
Backpatch-through: 16