[pgpool-committers: 7516] pgpool: Add release note.

[Bo Peng]

Add release note.

Branch
------
V4_2_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=db62786126a1f0cb300668a475dd07d0e913e873

Modified Files
--------------
doc.ja/src/sgml/release-3.6.sgml | 107 ++++++++++++++++++++++
doc.ja/src/sgml/release-3.7.sgml | 116 ++++++++++++++++++++++++
doc.ja/src/sgml/release-4.0.sgml | 145 ++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.1.sgml | 174 +++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.2.sgml | 189 ++++++++++++++++++++++++++++++++++++++-
doc.ja/src/sgml/version.sgml     |   2 +-
doc/src/sgml/release-3.6.sgml    |  95 ++++++++++++++++++++
doc/src/sgml/release-3.7.sgml    | 104 +++++++++++++++++++++
doc/src/sgml/release-4.0.sgml    | 134 +++++++++++++++++++++++++++
doc/src/sgml/release-4.1.sgml    | 162 +++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.2.sgml    | 176 ++++++++++++++++++++++++++++++++++++
doc/src/sgml/version.sgml        |   2 +-
12 files changed, 1402 insertions(+), 4 deletions(-)