pgbulkload - pgbulkload: work around 8.3 and 9.0.

Log Message:
-----------
work around 8.3 and 9.0. We cannot support 8.2 or prior versions.

Modified Files:
--------------
pgbulkload/bin/pgut:
pgut-list.c (r1.4 -> r1.5)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/pgut/pgut-list.c?r1=1.4&r2=1.5)
pgut.c (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/pgut/pgut.c?r1=1.14&r2=1.15)
pgut.h (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/pgut/pgut.h?r1=1.15&r2=1.16)
pgbulkload/include:
pg_bulkload.h (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/include/pg_bulkload.h?r1=1.14&r2=1.15)
pgbulkload/lib:
parser_function.c (r1.5 -> r1.6)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/parser_function.c?r1=1.5&r2=1.6)
pg_btree.c (r1.14 -> r1.15)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_btree.c?r1=1.14&r2=1.15)
pg_bulkload.c (r1.19 -> r1.20)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_bulkload.c?r1=1.19&r2=1.20)
reader.c (r1.16 -> r1.17)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/reader.c?r1=1.16&r2=1.17)
pgbulkload/lib/pgut:
pgut-be.h (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pgut/pgut-be.h?r1=1.6&r2=1.7)

Added Files:
-----------
pgbulkload/lib/nbtree:
nbtsort-9.0.c (r1.1)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/nbtree/nbtsort-9.0.c?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
-------------
pgbulkload/lib/nbtree:
nbtsort-8.5.c
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/nbtree/nbtsort-8.5.c)