[pgpool-committers: 7514] pgpool: Add release note.

[Bo Peng]

Add release note.

Branch
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V3_7_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=c2be41b75f0bc0b7ae38c03e64a24a5ed21e2828

Modified Files
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doc.ja/src/sgml/release-3.6.sgml | 107 ++++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-3.7.sgml | 116 +++++++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/version.sgml     |   2 +-
doc/src/sgml/release-3.6.sgml    |  95 ++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.7.sgml    | 104 +++++++++++++++++++++++++++++++++++
doc/src/sgml/version.sgml        |   2 +-
6 files changed, 424 insertions(+), 2 deletions(-)