Thread: pgsql: Improve documentation for START_REPLICATION ... LOGICAL.

Improve documentation for START_REPLICATION ... LOGICAL.

The starting point may not be exactly what the client requested; it
may be at the slot's confirmed_flush_lsn.

Also, upgrade the message from DEBUG1 to LOG when this happens.

Reviewed-by: Amit Kapila
Discussion: https://postgr.es/m/c5c861d576f2511732f8002c76245da587110b1c.camel%40j-davis.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/14d474e079e1edf08926a2e68028cbd82dd614c4

Modified Files
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doc/src/sgml/protocol.sgml                | 20 ++++++++++++++++----
src/backend/replication/logical/logical.c |  6 +++++-
2 files changed, 21 insertions(+), 5 deletions(-)