For the "freebsd10" branch in the freenas repository, switch to using a "freebsd10" branch in the trueos repository.

I created the "freebsd10" branch in the trueos repository
by doing a "git rebase" type of merge of all commits done on
the trueos feature/unified_freebsd branch, onto the
https://github.com/freebsd/freebsd/tree/stable/10 branch.  The point on the stable/10 branch
which I performed the rebase on was:

  * commit 085ec42db47d9829f69aa9c73852f0d1890cad68
  | Author: ken <ken@FreeBSD.org>
  | Date:   Thu May 22 16:34:00 2014 +0000

Thanks to Alfred Perlstein who gave me some tips on how to do a "git rebase".