[pgpool-committers: 842] pgpool: Fix to restart watchdog processes automatically when these exit

[Yugo Nagata]

Fix to restart watchdog processes automatically when these exit abnormally.

Branch
------
feature/watchdog_for_v3_3

Details
-------
http://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=8c22756510ead4ecdc0f560ef009d984409937bd

Modified Files
--------------
main.c                  |   18 +++-
watchdog/watchdog.c     |  188 ++++++++++++++++++++++++++++++++++++++++-------
watchdog/wd_child.c     |    8 +-
watchdog/wd_ext.h       |    9 ++-
watchdog/wd_lifecheck.c |   10 ++-
watchdog/wd_udp.c       |   23 +++++-
6 files changed, 211 insertions(+), 45 deletions(-)