In summary: to give destination files (both old and new) the source
permissions, use bf(--perms). To give new files the destination-default
-permissions (while leaving existing files unchanged) make sure that the
+permissions (while leaving existing files unchanged), make sure that the
bf(--perms) option is off and use bf(--chmod=ugo=rwX) (which ensures that
all non-masked bits get enabled). If you'd care to make this latter
behavior easier to type, you could define a popt alias for it, such as