Merge branch 'doc-backup-restore-def-vals' into 'nightly'

doc: Update 'backup', 'restore' default values

See merge request !143

CONFIGURE

@@ -497,9 +497,9 @@ Profile management.
 
 biolimit: max character length of bio; 0 means no limit; null means to use
     the site text limit default.
-backup: whether users can backup their own profiles. Defaults to true.
+backup: whether users can backup their own profiles. Defaults to false.
 restore: whether users can restore their profiles from backup files. Defaults
-	 to true.
+	 to false.
 delete: whether users can delete their own accounts. Defaults to false.
 move: whether users can move their accounts to another server. Defaults
       to true.