pgsql: Code review for --no-data-for-failed-tables patch.

Log Message:
-----------
Code review for --no-data-for-failed-tables patch.  Instead of trashing
one of the program's core data structures, make use of the existing
ability to selectively exclude TOC items by ID.  Slightly more code but
much less likely to create future maintenance problems.

Modified Files:
--------------
    pgsql/doc/src/sgml/ref:
        pg_restore.sgml (r1.62 -> r1.63)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/pg_restore.sgml.diff?r1=1.62&r2=1.63)
    pgsql/src/bin/pg_dump:
        pg_backup.h (r1.43 -> r1.44)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup.h.diff?r1=1.43&r2=1.44)
        pg_backup_archiver.c (r1.136 -> r1.137)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_archiver.c.diff?r1=1.136&r2=1.137)
        pg_restore.c (r1.83 -> r1.84)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_restore.c.diff?r1=1.83&r2=1.84)