[pgpool-committers: 4751] pgpool: Add release-notes 3.6.11 - 3.4.18.

[Bo Peng]

Add release-notes 3.6.11 - 3.4.18.

Branch
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V3_6_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=e1e61e02555759e8f57a6fef9b545ded4b7aceb0

Modified Files
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doc.ja/src/sgml/release-3.4.sgml |  57 ++++++++++++++++
doc.ja/src/sgml/release-3.5.sgml |  89 +++++++++++++++++++++++++
doc.ja/src/sgml/release-3.6.sgml | 136 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-3.4.sgml    |  35 ++++++++++
doc/src/sgml/release-3.5.sgml    |  57 ++++++++++++++++
doc/src/sgml/release-3.6.sgml    |  94 +++++++++++++++++++++++++++
6 files changed, 468 insertions(+)