pgsql: Last-minute updates for release notes.

Last-minute updates for release notes.

Revise description of CVE-2015-3166, in line with scaled-back patch.
Change release date.

Security: CVE-2015-3166

Branch
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REL9_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/bd9c6dc9ab9de8f07647015af65d6d2cec0057e3

Modified Files
--------------
doc/src/sgml/release-9.0.sgml |   26 ++++++++++++++++----------
doc/src/sgml/release-9.1.sgml |   26 ++++++++++++++++----------
doc/src/sgml/release-9.2.sgml |   26 ++++++++++++++++----------
doc/src/sgml/release-9.3.sgml |   26 ++++++++++++++++----------
doc/src/sgml/release-9.4.sgml |   33 +++++++++++++++++++++++----------
5 files changed, 87 insertions(+), 50 deletions(-)