pgbulkload - pgbulkload: Partial support for PGXS, because

Log Message:
-----------
Partial support for PGXS, because nbtree/nbtsort.c is required to build the library.

Modified Files:
--------------
    pgbulkload:
        README.pg_bulkload (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/README.pg_bulkload.diff?r1=1.2&r2=1.3)
        sample_bin.ctl (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/sample_bin.ctl.diff?r1=1.2&r2=1.3)
        sample_csv.ctl (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/sample_csv.ctl.diff?r1=1.2&r2=1.3)
    pgbulkload/bin:
        Makefile (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/Makefile.diff?r1=1.4&r2=1.5)
        pg_bulkload.c (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/pg_bulkload.c.diff?r1=1.5&r2=1.6)
    pgbulkload/bin/expected:
        init.out (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/expected/init.out.diff?r1=1.1&r2=1.2)
    pgbulkload/bin/pgut:
        pgut.c (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/pgut/pgut.c.diff?r1=1.1&r2=1.2)
        pgut.h (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/pgut/pgut.h.diff?r1=1.1&r2=1.2)
    pgbulkload/bin/sql:
        init.sql (r1.1 -> r1.2)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/sql/init.sql.diff?r1=1.1&r2=1.2)
    pgbulkload/lib:
        Makefile (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/Makefile.diff?r1=1.2&r2=1.3)
        pg_btree.c (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_btree.c.diff?r1=1.4&r2=1.5)