CD-ROM -> CDROM

O'Reilly has standardized on 'CD-ROM' as have several other

publishers, however 'CDROM' outnumbers 'CD-ROM' 2 to 1 in our
documentation and it has always appeared this way on FreeBSD CDs from
Walnut Creek/BSDi/WRS. I don't have a preference either way as long
as it stays consistent.