pgsql: Revert 56-bit relfilenode change and follow-up commits.

Revert 56-bit relfilenode change and follow-up commits.

There are still some alignment-related failures in the buildfarm,
which might or might not be able to be fixed quickly, but I've also
just realized that it increased the size of many WAL records by 4 bytes
because a block reference contains a RelFileLocator. The effect of that
hasn't been studied or discussed, so revert for now.

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/a448e49bcbe40fb72e1ed85af910dd216d45bad8

Modified Files
--------------
contrib/pg_buffercache/Makefile                    |   4 +-
contrib/pg_buffercache/meson.build                 |   1 -
.../pg_buffercache/pg_buffercache--1.3--1.4.sql    |  30 ---
contrib/pg_buffercache/pg_buffercache.control      |   2 +-
contrib/pg_buffercache/pg_buffercache_pages.c      |  39 +---
contrib/pg_prewarm/autoprewarm.c                   |   4 +-
contrib/pg_walinspect/expected/pg_walinspect.out   |   4 +-
contrib/pg_walinspect/sql/pg_walinspect.sql        |   4 +-
doc/src/sgml/catalogs.sgml                         |   2 +-
doc/src/sgml/func.sgml                             |   5 -
doc/src/sgml/pgbuffercache.sgml                    |   2 +-
doc/src/sgml/storage.sgml                          |  11 +-
src/backend/access/gin/ginxlog.c                   |   2 +-
src/backend/access/rmgrdesc/gistdesc.c             |   2 +-
src/backend/access/rmgrdesc/heapdesc.c             |   2 +-
src/backend/access/rmgrdesc/nbtdesc.c              |   2 +-
src/backend/access/rmgrdesc/seqdesc.c              |   2 +-
src/backend/access/rmgrdesc/xlogdesc.c             |  21 +--
src/backend/access/transam/README                  |   5 +-
src/backend/access/transam/varsup.c                | 209 +--------------------
src/backend/access/transam/xlog.c                  |  60 ------
src/backend/access/transam/xlogprefetcher.c        |  14 +-
src/backend/access/transam/xlogrecovery.c          |   6 +-
src/backend/access/transam/xlogutils.c             |   6 +-
src/backend/backup/basebackup.c                    |   2 +-
src/backend/catalog/catalog.c                      |  95 ++++++++++
src/backend/catalog/heap.c                         |  27 ++-
src/backend/catalog/index.c                        |  11 +-
src/backend/catalog/storage.c                      |   8 -
src/backend/commands/tablecmds.c                   |  12 +-
src/backend/commands/tablespace.c                  |   2 +-
src/backend/nodes/gen_node_support.pl              |   4 +-
src/backend/replication/logical/decode.c           |   1 -
src/backend/replication/logical/reorderbuffer.c    |   2 +-
src/backend/storage/file/reinit.c                  |  28 +--
src/backend/storage/freespace/fsmpage.c            |   2 +-
src/backend/storage/lmgr/lwlocknames.txt           |   1 -
src/backend/storage/smgr/md.c                      |   7 -
src/backend/storage/smgr/smgr.c                    |   2 +-
src/backend/utils/adt/dbsize.c                     |   7 +-
src/backend/utils/adt/pg_upgrade_support.c         |  13 +-
src/backend/utils/cache/inval.c                    |   9 +-
src/backend/utils/cache/relcache.c                 |   2 +-
src/backend/utils/cache/relfilenumbermap.c         |  28 ++-
src/backend/utils/misc/pg_controldata.c            |   9 +-
src/bin/pg_checksums/pg_checksums.c                |   4 +-
src/bin/pg_controldata/pg_controldata.c            |   2 -
src/bin/pg_dump/pg_dump.c                          |  26 +--
src/bin/pg_rewind/filemap.c                        |   6 +-
src/bin/pg_upgrade/info.c                          |   3 +-
src/bin/pg_upgrade/pg_upgrade.c                    |   6 +-
src/bin/pg_upgrade/relfilenumber.c                 |   4 +-
src/bin/pg_waldump/pg_waldump.c                    |   2 +-
src/bin/scripts/t/090_reindexdb.pl                 |   2 +-
src/common/relpath.c                               |  20 +-
src/fe_utils/option_utils.c                        |  40 ----
src/include/access/transam.h                       |  40 ----
src/include/access/xlog.h                          |   1 -
src/include/catalog/catalog.h                      |   3 +
src/include/catalog/catversion.h                   |   2 +-
src/include/catalog/pg_class.h                     |  16 +-
src/include/catalog/pg_control.h                   |   2 -
src/include/catalog/pg_proc.dat                    |  10 +-
src/include/common/relpath.h                       |   7 +-
src/include/fe_utils/option_utils.h                |   2 -
src/include/storage/buf_internals.h                |  55 +-----
src/include/storage/relfilelocator.h               |  12 +-
src/include/storage/sinval.h                       |   7 +-
src/test/regress/expected/alter_table.out          |  24 +--
src/test/regress/expected/fast_default.out         |   4 +-
src/test/regress/expected/oidjoins.out             |   2 +-
src/test/regress/sql/alter_table.sql               |   8 +-
src/test/regress/sql/fast_default.sql              |   4 +-
73 files changed, 305 insertions(+), 720 deletions(-)