[pgpool-committers: 9871] pgpool: Doc: add release notes.

[Bo Peng]

Doc: add release notes.

Branch
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V4_4_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=373b0aad1c3d57cc779f63501c27fd65db5c5471

Modified Files
--------------
doc.ja/src/sgml/release-4.1.sgml | 180 ++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.2.sgml | 195 +++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.3.sgml | 217 ++++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.4.sgml | 218 ++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.1.sgml    | 192 ++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.2.sgml    | 207 +++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.3.sgml    | 231 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.4.sgml    | 231 +++++++++++++++++++++++++++++++++++++++
8 files changed, 1671 insertions(+)