bin/5712: /bin/chio code cleaup and option added

[linimon at FreeBSD.org]

Synopsis: /bin/chio code cleaup and option added

State-Changed-From-To: feedback->suspended
State-Changed-By: linimon
State-Changed-When: Sat Apr 19 17:34:46 UTC 2008
State-Changed-Why: 
Feedback timeout from submitter.  I'll keep this around in case someone
wants to give cpio some TLC at some point.

http://www.freebsd.org/cgi/query-pr.cgi?pr=5712