Ensure device address latch bit is not set at the same time as the new address, as per datasheet.

Minor documentation fixes.

Fix broken USB host mode due to the USB frame counter not being updated during the early enumeration steps, causing USB_Host_DelayMS() to spinloop forever.

LUFA/Drivers/USB/LowLevel/USBInterrupt.c

@@ -34,14 +34,17 @@
 void USB_INT_DisableAllInterrupts(void)
 {
 	#if defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR)
-	USBCON &= ~((1 << VBUSTE) | (1 << IDTE));				
+	USBCON &= ~((1 << OTGPADE) | (1 << VBUSTE) | (1 << IDTE));				
 	#elif defined(USB_SERIES_4_AVR)
 	USBCON &= ~(1 << VBUSTE);
 	#endif
 	
+	#if defined(USB_CAN_BE_BOTH)
+	OTGIEN  = 0;
+	#endif
+	
 	#if defined(USB_CAN_BE_HOST)
 	UHIEN   = 0;
-	OTGIEN  = 0;
 	#endif
 	
 	#if defined(USB_CAN_BE_DEVICE)
@@ -55,9 +58,12 @@ void USB_INT_ClearAllInterrupts(void)
 	USBINT  = 0;
 	#endif
 	
+	#if defined(USB_CAN_BE_BOTH)
+	OTGINT  = 0;
+	#endif
+	
 	#if defined(USB_CAN_BE_HOST)
 	UHINT   = 0;
-	OTGINT  = 0;
 	#endif
 	
 	#if defined(USB_CAN_BE_DEVICE)