pgsql: Release notes for 9.6.1, 9.5.5, 9.4.10, 9.3.15, 9.2.19, 9.1.24.

Release notes for 9.6.1, 9.5.5, 9.4.10, 9.3.15, 9.2.19, 9.1.24.

Branch
------
REL9_6_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/6beb8c75ceed610a8e5d416882aad75fe722249e

Modified Files
--------------
doc/src/sgml/release-9.1.sgml | 218 ++++++++++-
doc/src/sgml/release-9.2.sgml | 272 +++++++++++++-
doc/src/sgml/release-9.3.sgml | 339 +++++++++++++++++-
doc/src/sgml/release-9.4.sgml | 472 +++++++++++++++++++++++-
doc/src/sgml/release-9.5.sgml | 814 +++++++++++++++++++++++++++++++++++++++++-
doc/src/sgml/release-9.6.sgml | 577 ++++++++++++++++++++++++++++++
6 files changed, 2676 insertions(+), 16 deletions(-)