pgbulkload - pgbulkload: Fix bugs in csv parser and --username option.

Log Message:
-----------
Fix bugs in csv parser and --username option.

Modified Files:
--------------
pgbulkload/bin/pgut:
pgut-fe.c (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/bin/pgut/pgut-fe.c?r1=1.3&r2=1.4)
pgbulkload/doc:
pg_bulkload-ja.html (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/doc/pg_bulkload-ja.html?r1=1.2&r2=1.3)
pgbulkload/lib:
parser_csv.c (r1.15 -> r1.16)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbulkload/pgbulkload/lib/parser_csv.c?r1=1.15&r2=1.16)