pgsql: docs: 9.4 release notes adjustments

docs: 9.4 release notes adjustments

Patch by Andres Freund, slight adjustments by me

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/062f53518927f9bfe1820578ce79d3180b1aa2ca

Modified Files
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doc/src/sgml/release-9.4.sgml | 185 +++++++++++++++++++++--------------------
1 file changed, 95 insertions(+), 90 deletions(-)

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