[COMMITTERS] pgsql: Remove secondary checkpoint

Remove secondary checkpoint

Previously server reserved WAL for last two checkpoints,
which used too much disk space for small servers.

Bumps PG_CONTROL_VERSION

Author: Simon Riggs <simon@2ndQuadrant.com>
Reviewed-by: Michael Paquier <michael.paquier@gmail.com>

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/4b0d28de06b28e57c540fca458e4853854fbeaf8

Modified Files
--------------
doc/src/sgml/backup.sgml                |  2 +-
doc/src/sgml/func.sgml                  |  5 --
src/backend/access/transam/xlog.c       | 93 ++++++++-------------------------
src/backend/utils/misc/pg_controldata.c | 79 +++++++++++++---------------
src/bin/pg_controldata/pg_controldata.c |  3 --
src/bin/pg_resetwal/pg_resetwal.c       |  1 -
src/include/catalog/pg_control.h        |  3 +-
src/include/catalog/pg_proc.h           |  2 +-
8 files changed, 62 insertions(+), 126 deletions(-)


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