[pgpool-committers: 8190] pgpool: Add 4.3RC1 release notes.

[Bo Peng]

Add 4.3RC1 release notes.

Branch
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V4_3_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=80b03a5a5d69aaa5dde56bfec5acd16e18bac555

Modified Files
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doc.ja/src/sgml/release-4.3.sgml | 87 ++++++++++++++++++----------------------
doc.ja/src/sgml/version.sgml     |  2 +-
doc/src/sgml/release-4.3.sgml    | 68 ++++++++++++++-----------------
doc/src/sgml/version.sgml        |  2 +-
4 files changed, 72 insertions(+), 87 deletions(-)