[Pgpool-committers] pgpool - pgpool-II: Update ChangeLog.

[User T-ishii]

Log Message:
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Update ChangeLog.

Modified Files:
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    pgpool-II:
        ChangeLog (r1.55 -> r1.56)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool-II/ChangeLog?r1=1.55&r2=1.56)