Thread: pgsql: Minor style policing for error messages in pg_dump tar code.

Log Message:
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Minor style policing for error messages in pg_dump tar code.  Notably, change
"dumping data out of order is not supported" to "restoring data out of order
is not supported", because you get that error during pg_restore not pg_dump.
Also fix some comments that didn't look so good after being pgindented as
perhaps they did originally.

Modified Files:
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    pgsql/src/bin/pg_dump:
        pg_backup_tar.c (r1.67 -> r1.68)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/bin/pg_dump/pg_backup_tar.c?r1=1.67&r2=1.68)