mention #U/usbn/port.

Reference: /n/sources/patch/applied/man-3-usb_mention_usbn_port
Date: Fri Sep 16 21:27:20 CES 2005

--- /sys/man/3/usb	Fri Sep 16 21:25:59 2005
+++ /sys/man/3/usb	Fri Sep 16 21:25:56 2005
@@ -201,6 +201,9 @@
 .SH FILES
 .TF "#U/usb n /*/status"
 .TP
+.BI #U/usb n /port
+USB port status file; for each port, space separated: port number, hexadecimal port status, port status string
+.TP
 .BI #U/usb n /*/status
 USB device status file; class/subclass/proto, vendor-id and product-id are found in line one
 .TP