handbook: 7.7 Image Scanners devfs.rules

[corvid]

In the handbook, section 7.7, near the bottom, it reads:

> Then, make the /dev/ugen0.2 symlink and the /dev/usb/0.2.0 device node accessible to the usb group with write permissions of 0660 or 0664 by adding the following lines to /etc/devfs.rules:

> [system=5]
> add path ugen0.2 mode 0660 group usb
> add path usb/0.2.0 mode 0666 group usb

The 0666 sounds like a typo.