[pgpool-committers: 10351] pgpool: Doc: add release notes.

[Bo Peng]

Doc: add release notes.

Branch
------
V4_5_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=a259f7e5b4ab1a43fd07f2d2ede94e734739a15b

Modified Files
--------------
doc.ja/src/sgml/release-4.2.sgml | 135 +++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.3.sgml | 135 +++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.4.sgml | 135 +++++++++++++++++++++++++++++++++++
doc.ja/src/sgml/release-4.5.sgml | 135 +++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.2.sgml    | 147 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.3.sgml    | 147 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.4.sgml    | 147 +++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.5.sgml    | 147 +++++++++++++++++++++++++++++++++++++++
8 files changed, 1128 insertions(+)