patch to add a tunable that disables ORDERED tag emission

[mjacob at freebsd.org]

On Mon, 30 Oct 2006, Scott Long wrote:

> I recall that Gibbs was a strong believer in the ordered tag, should
> probably get his input for this.
>

Of course- although the default behaviour after the patch is the same as 
before (e.g., the default leaves this enabled).