Log Message:
-----------
Assorted improvements to backup/restore documentation, per Thom Brown.
Modified Files:
--------------
pgsql/doc/src/sgml:
backup.sgml (r2.156 -> r2.157)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/backup.sgml?r1=2.156&r2=2.157)