[pgpool-committers: 7735] pgpool: Add release notes.

[Bo Peng]

Add release notes.

Branch
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V3_7_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=21a607bd0037a752c83fe2df231face8e9420d18

Modified Files
--------------
doc.ja/src/sgml/release-3.6.sgml | 80 ++++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-3.7.sgml | 89 ++++++++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/version.sgml     |  2 +-
doc/src/sgml/release-3.6.sgml    | 71 ++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.7.sgml    | 80 ++++++++++++++++++++++++++++++++++++
doc/src/sgml/version.sgml        |  2 +-
6 files changed, 322 insertions(+), 2 deletions(-)