pgsql: Make another editorial pass over the 9.6 release notes.

Make another editorial pass over the 9.6 release notes.

I think they're pretty much release-quality now.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/39d866433e6fb1c385eee8dc67843097b8703add

Modified Files
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doc/src/sgml/func.sgml | 28 +--
doc/src/sgml/release-9.6.sgml | 447 +++++++++++++++++++++++-------------------
doc/src/sgml/spgist.sgml | 1 +
3 files changed, 264 insertions(+), 212 deletions(-)

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