Thread: pgsql: Make pg_createsubscriber more wary about quoting connection para

Make pg_createsubscriber more wary about quoting connection parameters.

The original coding here could fail with database names, user names,
etc that contain spaces or other special characters.

As partial test coverage, extend the 040_pg_createsubscriber.pl
test script so that it uses a generated database name containing
funny characters.

Hayato Kuroda (some mods by me), per complaint from Noah Misch

Discussion: https://postgr.es/m/20240623062157.97.nmisch@google.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/b3f5ccebd79d9c7b73f4e04611cdf31fdf87420b

Modified Files
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src/bin/pg_basebackup/pg_createsubscriber.c        |  53 ++++++----
src/bin/pg_basebackup/t/040_pg_createsubscriber.pl | 111 ++++++++++++---------
2 files changed, 96 insertions(+), 68 deletions(-)