pgsql: Integrate recovery.conf into postgresql.conf

Integrate recovery.conf into postgresql.conf

recovery.conf settings are now set in postgresql.conf (or other GUC
sources). Currently, all the affected settings are PGC_POSTMASTER;
this could be refined in the future case by case.

Recovery is now initiated by a file recovery.signal. Standby mode is
initiated by a file standby.signal. The standby_mode setting is
gone. If a recovery.conf file is found, an error is issued.

The trigger_file setting has been renamed to promote_trigger_file as
part of the move.

The documentation chapter "Recovery Configuration" has been integrated
into "Server Configuration".

pg_basebackup -R now appends settings to postgresql.auto.conf and
creates a standby.signal file.

Author: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
Author: Simon Riggs <simon(at)2ndquadrant(dot)com>
Author: Abhijit Menon-Sen <ams(at)2ndquadrant(dot)com>
Author: Sergei Kornilov <sk(at)zsrv(dot)org>
Discussion: https://www.postgresql.org/message-id/flat/607741529606767(at)web3g(dot)yandex(dot)ru/

Branch
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master

Details
-------
https://git.postgresql.org/pg/commitdiff/2dedf4d9a899b36d1a8ed29be5efbd1b31a8fe85

Modified Files
--------------
contrib/pg_standby/pg_standby.c | 2 +-
doc/src/sgml/backup.sgml | 22 +-
doc/src/sgml/config.sgml | 515 ++++++++++++++++++++-
doc/src/sgml/filelist.sgml | 1 -
doc/src/sgml/func.sgml | 2 +-
doc/src/sgml/high-availability.sgml | 56 +--
doc/src/sgml/pgstandby.sgml | 2 +-
doc/src/sgml/postgres.sgml | 1 -
doc/src/sgml/recovery-config.sgml | 510 --------------------
doc/src/sgml/ref/pg_basebackup.sgml | 7 +-
doc/src/sgml/ref/pg_rewind.sgml | 8 +-
doc/src/sgml/ref/pgarchivecleanup.sgml | 4 +-
doc/src/sgml/ref/pgupgrade.sgml | 2 +-
doc/src/sgml/release-10.sgml | 2 +-
doc/src/sgml/release-9.1.sgml | 5 +-
doc/src/sgml/release-9.4.sgml | 15 +-
doc/src/sgml/release-9.5.sgml | 11 +-
doc/src/sgml/release.sgml | 3 +-
src/backend/Makefile | 4 +-
src/backend/access/transam/recovery.conf.sample | 158 -------
src/backend/access/transam/xlog.c | 500 +++++++-------------
src/backend/access/transam/xlogarchive.c | 4 +-
src/backend/commands/extension.c | 4 +-
src/backend/utils/misc/guc.c | 421 +++++++++++++++++
src/backend/utils/misc/postgresql.conf.sample | 47 ++
src/bin/pg_archivecleanup/pg_archivecleanup.c | 2 +-
src/bin/pg_basebackup/pg_basebackup.c | 148 ++++--
src/bin/pg_basebackup/t/010_pg_basebackup.pl | 15 +-
src/bin/pg_rewind/RewindTest.pm | 10 +-
src/include/access/xlog.h | 39 +-
src/include/utils/guc_tables.h | 2 +
src/port/quotes.c | 2 +-
src/test/perl/PostgresNode.pm | 26 +-
src/test/recovery/t/001_stream_rep.pl | 4 +-
src/test/recovery/t/003_recovery_targets.pl | 2 +-
src/test/recovery/t/004_timeline_switch.pl | 4 +-
src/test/recovery/t/005_replay_delay.pl | 2 +-
src/test/recovery/t/009_twophase.pl | 6 +-
.../recovery/t/010_logical_decoding_timelines.pl | 2 +-
src/test/recovery/t/012_subtransactions.pl | 6 +-
40 files changed, 1403 insertions(+), 1173 deletions(-)