pgsql: pg_basebackup: Add option to create replication slot

pg_basebackup: Add option to create replication slot

When requesting a particular replication slot, the new pg_basebackup
option -C/--create-slot creates it before starting to replicate from it.

Further refactor the slot creation logic to include the temporary slot
creation logic into the same function. Add new arguments is_temporary
and preserve_wal to CreateReplicationSlot(). Print in --verbose mode
that a slot has been created.

Author: Michael Banck <michael(dot)banck(at)credativ(dot)de>

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/3709ca1cf069cee24ef8000cb6a479813b5537df

Modified Files
--------------
doc/src/sgml/ref/pg_basebackup.sgml | 16 +++++++
src/bin/pg_basebackup/pg_basebackup.c | 63 ++++++++++++++++++++++++----
src/bin/pg_basebackup/pg_receivewal.c | 3 +-
src/bin/pg_basebackup/pg_recvlogical.c | 4 +-
src/bin/pg_basebackup/receivelog.c | 18 --------
src/bin/pg_basebackup/receivelog.h | 1 -
src/bin/pg_basebackup/streamutil.c | 16 ++++---
src/bin/pg_basebackup/streamutil.h | 5 ++-
src/bin/pg_basebackup/t/010_pg_basebackup.pl | 27 +++++++++++-
9 files changed, 112 insertions(+), 41 deletions(-)