[Pgpool-committers] pgpool - pgpool-II: Fix memory cache memcached case.

[User T-ishii]

Log Message:
-----------
Fix memory cache memcached case. Before it connected to memcached
every time query gets processed. Now it connects to memecached
one in pgpool child lifetime.
Also before it did not disconnect to memcached. This lead to TCP/IP
level errors. Now the problem has gone since pgpool child keeps
the connection to memcached.

Modified Files:
--------------
    pgpool-II:
        child.c (r1.74 -> r1.75)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/child.c?r1=1.74&r2=1.75)
        pool_memqcache.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_memqcache.c?r1=1.3&r2=1.4)
        pool_memqcache.h (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/pool_memqcache.h?r1=1.2&r2=1.3)