[pgpool-committers: 443] pgpool: Add English version of document for watchdog.

[Yugo Nagata]

Add English version of document for watchdog.

Branches
--------
feature/watchdog
master

Details
-------
http://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=1230b3c1b36a129175b9abdbc963a242c8bc5177

Modified Files
--------------
doc/wd-en.html |  229 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
doc/wd-en.jpg  |  Bin 0 -> 74424 bytes
2 files changed, 229 insertions(+), 0 deletions(-)