pgsql: pg_receivewal: Add --endpos option

pg_receivewal: Add --endpos option

This is primarily useful for making tests of this utility more
deterministic, to avoid the complexity of starting pg_receivewal as a
deamon in TAP tests.

While this is less useful than the equivalent pg_recvlogical option,
users can as well use it for example to enforce WAL streaming up to a
end-of-backup position, to save only a minimal amount of WAL.

Use this new option to stream WAL data in a deterministic way within a
new set of TAP tests.

Author: Michael Paquier <michael(dot)paquier(at)gmail(dot)com>

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/6d9fa52645e71711410a66b5349df3be0dd49608

Modified Files
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doc/src/sgml/ref/pg_receivewal.sgml | 16 ++++++++++
src/bin/pg_basebackup/pg_receivewal.c | 38 ++++++++++++++++++-----
src/bin/pg_basebackup/t/020_pg_receivewal.pl | 45 +++++++++++++++++++++++++++-
3 files changed, 91 insertions(+), 8 deletions(-)