pgbulkload - pgbulkload: Add parallel loader for pg_bulkload 3.0.

Log Message:
-----------
Add parallel loader for pg_bulkload 3.0.
If LOADER=PARALLEL is specified, input file parse and data load are executed
in different backends. Parsed tuples are passed through a shared memory queue.
Loading would be improved at best twice as faster as loading with single process.

Modified Files:
--------------
    pgbulkload/bin:
        Makefile (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/Makefile?r1=1.5&r2=1.6)
        pg_bulkload.c (r1.9 -> r1.10)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/pg_bulkload.c?r1=1.9&r2=1.10)
        postgresql (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/postgresql?r1=1.3&r2=1.4)
    pgbulkload/bin/expected:
        init.out (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/expected/init.out?r1=1.2&r2=1.3)
    pgbulkload/bin/sql:
        init.sql (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/sql/init.sql?r1=1.2&r2=1.3)
    pgbulkload/include:
        pg_btree.h (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/include/pg_btree.h?r1=1.3&r2=1.4)
        pg_bulkload.h (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/include/pg_bulkload.h?r1=1.7&r2=1.8)
        reader.h (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/include/reader.h?r1=1.2&r2=1.3)
        writer.h (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/include/writer.h?r1=1.3&r2=1.4)
    pgbulkload/lib:
        Makefile (r1.6 -> r1.7)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/Makefile?r1=1.6&r2=1.7)
        pg_btree.c (r1.8 -> r1.9)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_btree.c?r1=1.8&r2=1.9)
        pg_bulkload.c (r1.10 -> r1.11)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_bulkload.c?r1=1.10&r2=1.11)
        pg_bulkload.sql.in (r1.5 -> r1.6)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_bulkload.sql.in?r1=1.5&r2=1.6)
        pg_strutil.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_strutil.c?r1=1.3&r2=1.4)
        reader.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/reader.c?r1=1.3&r2=1.4)
        uninstall_pg_bulkload.sql (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/uninstall_pg_bulkload.sql?r1=1.4&r2=1.5)

Added Files:
-----------
    pgbulkload/bin/expected:
        load_parallel.out (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/expected/load_parallel.out?rev=1.1&content-type=text/x-cvsweb-markup)
    pgbulkload/bin/sql:
        load_parallel.sql (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/sql/load_parallel.sql?rev=1.1&content-type=text/x-cvsweb-markup)
    pgbulkload/lib:
        parser_binary.c (r1.1)

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

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

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

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

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

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

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/writer_parallel.c?rev=1.1&content-type=text/x-cvsweb-markup)
    pgbulkload/lib/pgut:
        pgut-ipc.c (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pgut/pgut-ipc.c?rev=1.1&content-type=text/x-cvsweb-markup)
        pgut-ipc.h (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pgut/pgut-ipc.h?rev=1.1&content-type=text/x-cvsweb-markup)

Removed Files:
-------------
    pgbulkload/lib:
        pg_heap_buffered.c
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_heap_buffered.c)
        pg_heap_direct.c
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_heap_direct.c)
        pg_input_csv.c
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_input_csv.c)
        pg_input_fixed.c
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/pg_input_fixed.c)
        writer.c
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/writer.c)