[pgpool-committers: 8077] pgpool: Enhance SIGHLD handler of Pgpool-II main process.

[Tatsuo Ishii]

Enhance SIGHLD handler of Pgpool-II main process.

When Pgpool-II child is killed by SIGKILL signal, the SIGHLD handler
just emitted LOG level message as other signals.  But SIGKILL is an
important event, for example killed by OOM killer. So emit a WARNING
level message instead.

Per suggestion from Michail Alexakis.
Discussion: https://www.pgpool.net/pipermail/pgpool-general/2021-October/007808.html

Branch
------
V3_6_STABLE

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=01509b12711f90682445eeb08b313ef3b2e14e3e

Modified Files
--------------
src/main/pgpool_main.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)