[Pgpool-committers] pgpool - pgpool-II: Add health_check_password directive.

[User T-ishii]

Log Message:
-----------
Add health_check_password directive.
Enhance check_replication_time_lag() error message.
Patch contributed by Nicolas Thauvin.

His message:

We are currently not able to specify the password of the health check
user, which is needed at least for streaming replication lag.  So I
added the possibility to specify it in the configuration file, in the
attached patch.

Also, I find the error message in check_replication_time_lag()
(pool_worker_child.c) not friendly :

pool_error("check_replication_time_lag: DB node is valid but no
persistent connection");

What about sending this error message to the debug level and adding a
second message on the error level?  Fro example:

pool_error("check_replication_time_lag: could not connect to DB node %d,
check health check configuration", i);

Modified Files:
--------------
    pgpool-II:
        pgpool.conf.sample (r1.46 -> r1.47)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pgpool.conf.sample?r1=1.46&r2=1.47)
        pgpool.conf.sample-master-slave (r1.20 -> r1.21)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pgpool.conf.sample-master-slave?r1=1.20&r2=1.21)
        pgpool.conf.sample-replication (r1.18 -> r1.19)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pgpool.conf.sample-replication?r1=1.18&r2=1.19)
        pgpool.conf.sample-stream (r1.13 -> r1.14)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pgpool.conf.sample-stream?r1=1.13&r2=1.14)
        pool_config.c (r1.61 -> r1.62)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_config.c?r1=1.61&r2=1.62)
        pool_config.h (r1.14 -> r1.15)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_config.h?r1=1.14&r2=1.15)
        pool_config.l (r1.57 -> r1.58)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_config.l?r1=1.57&r2=1.58)
        pool_worker_child.c (r1.9 -> r1.10)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_worker_child.c?r1=1.9&r2=1.10)
    pgpool-II/doc:
        pgpool-en.html (r1.95 -> r1.96)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/doc/pgpool-en.html?r1=1.95&r2=1.96)
        pgpool-ja.html (r1.134 -> r1.135)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/doc/pgpool-ja.html?r1=1.134&r2=1.135)