[Pgpool-committers] pgpool - pgpool: Update release note.

[User Y-asaba]

Log Message:
-----------
Update release note.

Modified Files:
--------------
    pgpool:
        NEWS (r1.30 -> r1.31)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool/NEWS.diff?r1=1.30&r2=1.31)