[pgpool-committers: 8149] pgpool: Add release notes for Pgpool-II 4.2.6

[Masaya Kawamoto]

Add release notes for Pgpool-II 4.2.6

Branch
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V4_2_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=fb9f31c991462da2e793b471ff89414fd039e383

Modified Files
--------------
doc.ja/src/sgml/release-3.6.sgml | 166 ++++++++++++++++++++++++++++
doc.ja/src/sgml/release-3.7.sgml | 177 ++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.0.sgml | 193 +++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.1.sgml | 217 +++++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.2.sgml | 196 +++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.6.sgml    | 175 ++++++++++++++++++++++++++++++
doc/src/sgml/release-3.7.sgml    | 185 ++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.0.sgml    | 201 ++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.1.sgml    | 226 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.2.sgml    | 205 +++++++++++++++++++++++++++++++++++
10 files changed, 1941 insertions(+)