[pgpool-committers: 5274] pgpool: doc: change to release notes.

[Bo Peng]

doc: change to release notes.

Branch
------
V4_0_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=01bb3cb0f46a1a870ee75a5b921339cca07cc1a7

Modified Files
--------------
doc.ja/src/sgml/release-4.0.sgml | 47 ++++++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.0.sgml    | 35 ++++++++++++++++++++++++++++++
2 files changed, 82 insertions(+)