[T10] Bug in Third-party Copy VPD page

[Ralph Weber]

In the General Copy Operations third-party copy descriptor of the 
Third-party Copy VPD page SPC-5 r08 through at least SPC-4 r37a have 
inconsistently represented the size of the MAXIMUM SEGMENT LENGTH field. 
Depending on whether one reads the bytes column of the field format 
notation, the field is either 4 bytes (per the bytes column) or 2 bytes 
(per the black and white reading of the field format notation).

An excerpted copy of the table with the problem highlighted is available in:
http://www.t10.org/cgi-bin/ac.pl?t=d&f=16-054r0.pdf

The editorial fix is to declare the field to be 4 bytes in size and fix 
the field format accordingly.

If the field is intended to be 2 bytes, then a change proposal will be 
required since additional changes will be required to maintain the 
descriptor's total size.

Comments are hereby solicited from those who have implemented the 
Third-party Copy VPD page.

All the best,

.Ralph