Обсуждение: pgsql: Make an editing pass over v11 release notes.

Make an editing pass over v11 release notes.

Set the release date.  Do a bunch of copy-editing and markup improvement,
rearrange some stuff into what seemed a more sensible order, move some
things that did not seem to be in the right section.

Branch
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REL_11_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/a31af2551fed8cb7d2d52f3dbe6c6e0d21a1c57c

Modified Files
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doc/src/sgml/release-11.sgml | 952 ++++++++++++++++++++++++-------------------
1 file changed, 523 insertions(+), 429 deletions(-)