Log Message:
-----------
Provide a concrete example of parameter expansion in archive_command.
Per discussion of bug #3877. Simon Riggs, some fixes by moi.
Modified Files:
--------------
pgsql/doc/src/sgml:
backup.sgml (r2.112 -> r2.113)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/backup.sgml?r1=2.112&r2=2.113)