Log Message:
-----------
Add info about using rsync to make base backups. Per report from
Jeff Frost, it may be necessary to ignore specific exit codes.
Modified Files:
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pgsql/doc/src/sgml:
backup.sgml (r2.73 -> r2.74)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/backup.sgml.diff?r1=2.73&r2=2.74)