Logical replication support for TRUNCATE

Update the built-in logical replication system to make use of the
previously added logical decoding for TRUNCATE support.  Add the
required truncate callback to pgoutput and a new logical replication
protocol message.

Publications get a new attribute to determine whether to replicate
truncate actions.  When updating a publication via pg_dump from an older
version, this is not set, thus preserving the previous behavior.

Author: Simon Riggs <si...@2ndquadrant.com>
Author: Marco Nenciarini <marco.nenciar...@2ndquadrant.it>
Author: Peter Eisentraut <peter.eisentr...@2ndquadrant.com>
Reviewed-by: Petr Jelinek <petr.jeli...@2ndquadrant.com>
Reviewed-by: Andres Freund <and...@anarazel.de>
Reviewed-by: Alvaro Herrera <alvhe...@alvh.no-ip.org>

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/039eb6e92f20499ac36cc74f8a5cef7430b706f6

Modified Files
--------------
doc/src/sgml/catalogs.sgml                  |   8 ++
doc/src/sgml/logical-replication.sgml       |  13 +--
doc/src/sgml/protocol.sgml                  |  56 ++++++++++
doc/src/sgml/ref/create_publication.sgml    |  10 +-
src/backend/catalog/pg_publication.c        |   1 +
src/backend/commands/publicationcmds.c      |  20 +++-
src/backend/replication/logical/proto.c     |  55 ++++++++++
src/backend/replication/logical/worker.c    |  68 ++++++++++++
src/backend/replication/pgoutput/pgoutput.c | 129 +++++++++++++++-------
src/backend/utils/cache/relcache.c          |   3 +-
src/bin/pg_dump/pg_dump.c                   |  33 ++++--
src/bin/pg_dump/pg_dump.h                   |   1 +
src/bin/pg_dump/t/002_pg_dump.pl            |   2 +-
src/bin/psql/describe.c                     |  26 ++++-
src/include/catalog/catversion.h            |   2 +-
src/include/catalog/pg_publication.h        |   7 +-
src/include/replication/logicalproto.h      |   4 +
src/test/regress/expected/publication.out   |  84 +++++++--------
src/test/subscription/t/010_truncate.pl     | 161 ++++++++++++++++++++++++++++
19 files changed, 572 insertions(+), 111 deletions(-)

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