Doc: fix load balance explanation missed Slony mode.
Since Slony mode will gone in master branch, fix is not applied to
master branch.
Backpatch-through: v4.6 to v4.2
Branch
------
V4_2_STABLE
Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=beea1f9f610363d284d475ed3c9320e8a07410e9
Modified Files
--------------
doc.ja/src/sgml/loadbalance.sgml | 2 +-
doc/src/sgml/loadbalance.sgml | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)