Add a comment about the fact that the usb module is automatically

loaded.

usr.sbin/usbd/usbd.8

@@ -65,6 +65,13 @@ The (multiple)
 command line options specify which controllers it should handle.
 Normally this option is not needed.
 .Pp
+If the
+.Dq usb ,
+.Dq ohci
+and
+.Dq uhci
+modules are not loaded, it will load them automatically.
+.Pp
 The second part is the handling of the attachment and detachment of USB
 devices.
 The device