Pretend that we support BYTCHK=1 in WRITE AND VERIFY command.

Technically that is not true, but since we don't implement VERIFY there
at all, doing only WRITE part, this is a minor sin.


git-svn-id: svn+ssh://svn.freebsd.org/base/head@271959 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f