[pgpool-committers: 5360] pgpool: Add release notes.

[Bo Peng]

Add release notes.

Branch
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master

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=2098056a859d86e88b62813abfbcc19018a7dad3

Modified Files
--------------
doc.ja/src/sgml/release-3.4.sgml | 112 +++++++++++++++++++++++++
doc.ja/src/sgml/release-3.5.sgml | 124 ++++++++++++++++++++++++++++
doc.ja/src/sgml/release-3.6.sgml | 124 ++++++++++++++++++++++++++++
doc.ja/src/sgml/release-3.7.sgml | 124 ++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.0.sgml | 171 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.4.sgml    |  79 ++++++++++++++++++
doc/src/sgml/release-3.5.sgml    |  89 ++++++++++++++++++++
doc/src/sgml/release-3.6.sgml    |  89 ++++++++++++++++++++
doc/src/sgml/release-3.7.sgml    |  88 ++++++++++++++++++++
doc/src/sgml/release-4.0.sgml    | 120 +++++++++++++++++++++++++++
10 files changed, 1120 insertions(+)