[pgpool-committers: 3424] pgpool: Add comment to the document about connection_cache.

[Tatsuo Ishii]

Add comment to the document about connection_cache.

Mention that connections to template0, template1, postgres and
regression databases are not cached even if connection_cache is on.

Branch
------
V3_3_STABLE

Details
-------
http://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=14d3d30c21219fb28531a0883c29e5be79a3815c

Modified Files
--------------
doc/pgpool-en.html | 5 ++++-
doc/pgpool-ja.html | 4 +++-
2 files changed, 7 insertions(+), 2 deletions(-)