[pgpool-committers: 6556] pgpool: Doc: add release-notes.

[Bo Peng]

Doc: add release-notes.

Branch
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V4_0_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=cd21e2cb989199b3ae74aeab88e3b17de934c79a

Modified Files
--------------
doc.ja/src/sgml/release-3.5.sgml | 108 ++++++++++++++++++++++
doc.ja/src/sgml/release-3.6.sgml | 122 ++++++++++++++++++++++++
doc.ja/src/sgml/release-3.7.sgml | 184 ++++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.0.sgml | 195 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.5.sgml    |  77 ++++++++++++++++
doc/src/sgml/release-3.6.sgml    |  89 ++++++++++++++++++
doc/src/sgml/release-3.7.sgml    | 124 +++++++++++++++++++++++++
doc/src/sgml/release-4.0.sgml    | 147 +++++++++++++++++++++++++++++
8 files changed, 1046 insertions(+)