Log Message:
-----------
Fix example archive_command for standalone backups so it doesn't return spurious non-zero.
Modified Files:
--------------
pgsql/doc/src/sgml:
backup.sgml (r2.109 -> r2.110)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/backup.sgml?r1=2.109&r2=2.110)