[pgpool-committers: 5649] pgpool: Doc: add restriction entry

[Takuma Hoshiai]

Doc: add restriction entry

master branch's commit(ea1998b7350de6882bea25fc3634c4f7673adbde) backport to 3.6-4.0.

Branch
------
V4_0_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=c845e30d4e2cca4649c0b4d3eaa5943334ed8a53

Modified Files
--------------
doc.ja/src/sgml/restrictions.sgml | 59 +++++++++++++++++++++++++++++++++++----
doc/src/sgml/restrictions.sgml    | 37 ++++++++++++++++++++++--
2 files changed, 89 insertions(+), 7 deletions(-)