Add an entry about slow starting SCSI CD-ROM:

When I booted my system without the above option, the CDROM could not
respond in time to the bootup probe of devices and was "missed". When
I tried to access the device I got the "Device not configured" error
message. I rebuilt the kernel with the SCSI_DELAY option and the
problem went away.

Submitted by: Jon Wallace <adrl@whoweb.com>