[Pgpool-committers] pgpool - pgpool: Add signal blocking.

[User T-ishii]

Log Message:
-----------
Add signal blocking. signal handlers may call pool_error() etc.
while processing. This is not good for them. For example, 
messages might be confused.

Modified Files:
--------------
    pgpool:
        pool_error.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool/pool_error.c.diff?r1=1.3&r2=1.4)