pgsql: Add point_ops opclass for GiST.

Log Message:
-----------
Add point_ops opclass for GiST.

Modified Files:
--------------
    pgsql/src/backend/access/gist:
        gistproc.c (r1.19 -> r1.20)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/access/gist/gistproc.c?r1=1.19&r2=1.20)
    pgsql/src/backend/utils/adt:
        geo_ops.c (r1.106 -> r1.107)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/geo_ops.c?r1=1.106&r2=1.107)
    pgsql/src/include/catalog:
        catversion.h (r1.571 -> r1.572)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h?r1=1.571&r2=1.572)
        pg_amop.h (r1.92 -> r1.93)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_amop.h?r1=1.92&r2=1.93)
        pg_amproc.h (r1.77 -> r1.78)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_amproc.h?r1=1.77&r2=1.78)
        pg_opclass.h (r1.87 -> r1.88)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_opclass.h?r1=1.87&r2=1.88)
        pg_operator.h (r1.169 -> r1.170)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_operator.h?r1=1.169&r2=1.170)
        pg_opfamily.h (r1.13 -> r1.14)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_opfamily.h?r1=1.13&r2=1.14)
        pg_proc.h (r1.560 -> r1.561)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_proc.h?r1=1.560&r2=1.561)
    pgsql/src/include/utils:
        geo_decls.h (r1.56 -> r1.57)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/geo_decls.h?r1=1.56&r2=1.57)
    pgsql/src/test/regress/expected:
        create_index.out (r1.35 -> r1.36)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/create_index.out?r1=1.35&r2=1.36)
        opr_sanity.out (r1.89 -> r1.90)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/opr_sanity.out?r1=1.89&r2=1.90)
        point.out (r1.18 -> r1.19)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/point.out?r1=1.18&r2=1.19)
        sanity_check.out (r1.43 -> r1.44)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/sanity_check.out?r1=1.43&r2=1.44)
    pgsql/src/test/regress/sql:
        create_index.sql (r1.29 -> r1.30)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/create_index.sql?r1=1.29&r2=1.30)
        point.sql (r1.13 -> r1.14)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/point.sql?r1=1.13&r2=1.14)