[pgpool-committers: 6329] pgpool: Doc: update 4.1 release-note.

[Bo Peng]

Doc: update 4.1 release-note.

Branch
------
V4_1_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=1b34ec923e54e447df59d7612dc8226360ab44cb

Modified Files
--------------
doc.ja/src/sgml/release-4.1.sgml | 37 +++++++++++++++++++++++++++++++++++++
doc/src/sgml/release-4.1.sgml    | 22 ++++++++++++++++++++++
2 files changed, 59 insertions(+)