Log Message:
-----------
Fix race condition between unsetting SIGCHLD flag and unblocking
SIGCHLD signal.
Modified Files:
--------------
pgpool-II:
main.c (r1.8 -> r1.9)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/main.c.diff?r1=1.8&r2=1.9)