[PATCH 7/8] lib: add NOTMUCH_EXCLUDE_FLAG to notmuch_exclude_t

[Ethan Glasser-Camp]

Ethan Glasser-Camp <ethan.glasser.camp at gmail.com> writes:

> It looks like you have better wording for patch 4/8 so I'd like to see
> you resend it.
>
> I'm marking patches 3, 4, and 7 as moreinfo. Please resubmit!

It turns out that patch 4 already has a v2 in the thread, but I didn't
see it due to some kind of selective blindness. It would be nice if
nmbug had grouped it as part of the same patch series. 

I'm marking the old patch 4/8 obsolete. Only patch 3 and 7 remain.

Ethan