[pgpool-committers: 7736] 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=a6466a3f98c946cd278532d4da0a978cb2410da5

Modified Files
--------------
doc.ja/src/sgml/release-3.6.sgml |  80 +++++++++++++++
doc.ja/src/sgml/release-3.7.sgml |  89 ++++++++++++++++
doc.ja/src/sgml/release-4.0.sgml |  99 ++++++++++++++++++
doc.ja/src/sgml/release-4.1.sgml | 181 +++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.2.sgml | 213 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.6.sgml    |  71 +++++++++++++
doc/src/sgml/release-3.7.sgml    |  80 +++++++++++++++
doc/src/sgml/release-4.0.sgml    |  90 +++++++++++++++++
doc/src/sgml/release-4.1.sgml    | 171 +++++++++++++++++++++++++++++++
doc/src/sgml/release-4.2.sgml    | 201 ++++++++++++++++++++++++++++++++++++
10 files changed, 1275 insertions(+)