[Midnightbsd-cvs] src: dd.1: document cdrom usage

[laffer1 at midnightbsd.org]

Log Message:
-----------
document cdrom usage

Modified Files:
--------------
    src/bin/dd:
        dd.1 (r1.2 -> r1.3)
        (http://cvsweb.midnightbsd.org/src/bin/dd/dd.1?r1=1.2&r2=1.3)