bin/39439: tcopy(1) will not duplicate tapes with block size larger than 64kbytes

[eadler at FreeBSD.org]

Synopsis: tcopy(1) will not duplicate tapes with block size larger than 64kbytes

Responsible-Changed-From-To: eadler->freebsd-bugs
Responsible-Changed-By: eadler
Responsible-Changed-When: Sun Sep 2 17:05:21 UTC 2012
Responsible-Changed-Why: 
I won't be looking at this PR for a while and I need to clear some out
of my queue

http://www.freebsd.org/cgi/query-pr.cgi?pr=39439