[pgpool-committers: 8609] pgpool: Doc: add release notes.

[Bo Peng]

Doc: add release notes.

Branch
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V4_2_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=221e8e44a322cc5c695bbf66501f06b5864f2d35

Modified Files
--------------
doc.ja/src/sgml/release-3.7.sgml | 142 +++++++++++++++++++++++
doc.ja/src/sgml/release-4.0.sgml | 179 +++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.1.sgml | 198 ++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.2.sgml | 235 ++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.7.sgml    | 143 ++++++++++++++++++++++++
doc/src/sgml/release-4.0.sgml    | 180 +++++++++++++++++++++++++++++
doc/src/sgml/release-4.1.sgml    | 199 +++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.2.sgml    | 236 +++++++++++++++++++++++++++++++++++++++
8 files changed, 1512 insertions(+)