pgsql: Merge wal_level "archive" and "hot_standby" into new name "repli

Merge wal_level "archive" and "hot_standby" into new name "replica"

The distinction between "archive" and "hot_standby" existed only because
at the time "hot_standby" was added, there was some uncertainty about
stability. This is now a long time ago. We would like to move forward
with simplifying the replication configuration, but this distinction is
in the way, because a primary server cannot tell (without asking a
standby or predicting the future) which one of these would be the
appropriate level.

Pick a new name for the combined setting to make it clearer that it
covers all (non-logical) backup and replication uses. The old values
are still accepted but are converted internally.

Reviewed-by: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
Reviewed-by: David Steele <david(at)pgmasters(dot)net>

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/b555ed8102672cfedb06559952b8341756386d69

Modified Files
--------------
doc/src/sgml/backup.sgml | 4 ++--
doc/src/sgml/config.sgml | 30 +++++++++++----------------
doc/src/sgml/high-availability.sgml | 2 +-
doc/src/sgml/ref/alter_system.sgml | 2 +-
doc/src/sgml/ref/pgupgrade.sgml | 2 +-
src/backend/access/rmgrdesc/xlogdesc.c | 5 +++--
src/backend/access/transam/xact.c | 2 +-
src/backend/access/transam/xlog.c | 20 ++++++++----------
src/backend/access/transam/xlogfuncs.c | 2 +-
src/backend/postmaster/postmaster.c | 2 +-
src/backend/replication/slot.c | 2 +-
src/backend/utils/misc/postgresql.conf.sample | 2 +-
src/bin/pg_basebackup/t/010_pg_basebackup.pl | 2 +-
src/bin/pg_controldata/pg_controldata.c | 6 ++----
src/include/access/xlog.h | 11 +++++-----
src/include/catalog/pg_control.h | 2 +-
src/test/perl/PostgresNode.pm | 2 +-
17 files changed, 44 insertions(+), 54 deletions(-)