pgsql: Fix MAINTAIN privileges for toast tables and partitions.

Fix MAINTAIN privileges for toast tables and partitions. Commit 60684dd8 left loose ends when it came to maintaining toast tables or partitions. For toast tables, simply skip the privilege check if the toast table is an indirect target of the maintenance command, because the main table privileges

pgsql: Doc: fix typo in backup.sgml.

Doc: fix typo in backup.sgml. archive_command was unnecessarily repeated. Author: Tatsuo Ishii Reviewed-by: Amit Kapila Backpatch-through: 15 Discussion: https://postgr.es/m/flat/20230114.110234.666053507266410467.t-ishii%40sranhm.sra.co.jp Branch -- master Details --- https://git.post

pgsql: Doc: fix typo in backup.sgml.

Doc: fix typo in backup.sgml. archive_command was unnecessarily repeated. Author: Tatsuo Ishii Reviewed-by: Amit Kapila Backpatch-through: 15 Discussion: https://postgr.es/m/flat/20230114.110234.666053507266410467.t-ishii%40sranhm.sra.co.jp Branch -- REL_15_STABLE Details --- https://g