Minor improvements in backup and recovery:

- create a separate archive_mode GUC, on which archive_command is dependent

- %r option in recovery.conf sends last restartpoint to recovery command

- %r used in pg_standby, updated README

- minor other code cleanup in pg_standby

- doc on Warm Standby now mentions pg_standby and %r

- log_restartpoints recovery option emits LOG message at each restartpoint

- end of recovery now displays last transaction end time, as requested
  by Warren Little; also shown at each restartpoint

- restart archiver if needed to carry away WAL files at shutdown

Simon Riggs

src/backend/utils/misc/postgresql.conf.sample

@@ -174,6 +174,8 @@
 
 # - Archiving -
 
+#archive_mode = off		# allows archiving to be done
+				# (change requires restart)
 #archive_command = ''		# command to use to archive a logfile segment
 #archive_timeout = 0		# force a logfile segment switch after this
 				# many seconds; 0 is off