pgsql: Last-minute release note updates.

Last-minute release note updates.

Security: CVE-2012-0866, CVE-2012-0867, CVE-2012-0868

Branch
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REL8_4_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/44909f44d99a7511ae7e2d7f106d09676b4026be

Modified Files
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doc/src/sgml/release-8.3.sgml | 30 ++++++++++++++++++++++++
doc/src/sgml/release-8.4.sgml | 50 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 80 insertions(+), 0 deletions(-)