[pgpool-committers: 9285] pgpool: Doc: Enhancing installation documentation.

[Bo Peng]

Doc: Enhancing installation documentation.
- add detailed decriptions of packages
- mention that  pgpool-II-pgXX-extensions needs to be installed on PostgreSQL servers

Branch
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V4_2_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=248d88f4db0dafebf33479adf469f23ae2078428

Modified Files
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doc.ja/src/sgml/installation-rpm.sgml | 313 +++++++++++++++++++++-------------
doc.ja/src/sgml/installation.sgml     |   2 +-
doc/src/sgml/installation-rpm.sgml    | 244 +++++++++++++++++---------
doc/src/sgml/installation.sgml        |   2 +-
4 files changed, 361 insertions(+), 200 deletions(-)