[pgpool-committers: 9370] pgpool: Doc: add release notes.

[Bo Peng]

Doc: add release notes.

Branch
------
V4_4_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=d570a776cae01c41a967f7300c6892db79358ced

Modified Files
--------------
doc.ja/src/sgml/release-4.0.sgml | 338 ++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.1.sgml | 338 ++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.2.sgml | 393 +++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.3.sgml | 457 ++++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.4.sgml | 380 ++++++++++++++++++++++++++++++
doc/src/sgml/release-4.0.sgml    | 362 ++++++++++++++++++++++++++++
doc/src/sgml/release-4.1.sgml    | 362 ++++++++++++++++++++++++++++
doc/src/sgml/release-4.2.sgml    | 417 +++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.3.sgml    | 495 ++++++++++++++++++++++++++++++++++++++-
doc/src/sgml/release-4.4.sgml    | 399 +++++++++++++++++++++++++++++++
10 files changed, 3937 insertions(+), 4 deletions(-)