pgsql: Test replay of regression tests, attempt II.

Test replay of regression tests, attempt II.

See commit message for 123828a7fa563025d0ceee10cf1b2a253cd05319.  The
only change this time is the order of the arguments passed to
pg_regress.  The previously version broke in the build farm environment
due to the contents of EXTRA_REGRESS_OPTS (see also commit 8cade04c
which had to do something similar).

Discussion: https://postgr.es/m/CA%2BhUKGKpRWQ9SxdxxDmTBCJoR0YnFpMBe7kyzY8SUQk%2BHeskxg%40mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/f47ed79cc8a0cfa154dc7f01faaf59822552363f

Modified Files
--------------
doc/src/sgml/regress.sgml                 | 11 +++++
src/test/recovery/Makefile                |  6 ++-
src/test/recovery/t/027_stream_regress.pl | 79 +++++++++++++++++++++++++++++++
src/tools/msvc/vcregress.pl               |  2 +
4 files changed, 97 insertions(+), 1 deletion(-)