[pgpool-committers: 6012] pgpool: Doc: add 3.6.18-3.4.25 release-note.

[Bo Peng]

Doc: add 3.6.18-3.4.25 release-note.

Branch
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V3_6_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=19d367bf0980d49bdabb7882c6b2b5011b737b3c

Modified Files
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doc.ja/src/sgml/release-3.4.sgml | 176 +++++++++++++++++++++
doc.ja/src/sgml/release-3.5.sgml | 247 +++++++++++++++++++++++++++++
doc.ja/src/sgml/release-3.6.sgml | 328 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.4.sgml    | 127 +++++++++++++++
doc/src/sgml/release-3.5.sgml    | 177 +++++++++++++++++++++
doc/src/sgml/release-3.6.sgml    | 237 ++++++++++++++++++++++++++++
6 files changed, 1292 insertions(+)