feature freeze for notmuch 0.19

[David Bremner]

David Bremner <david at tethera.net> writes:

> Hi Gang;
>
> As always we have plenty of things on the go, but I think theres enough
> merged in since 0.18.2 (yesterday!) to make a release worthwhile. To
> pick a date completely at random *cough* I'd like to freeze on November
> 5. For those of you just joining us that means I'll merge master to
> release at that point, and then only take "important" bug fix and NEWS
> patches onto release for the next week or so, followed by a release.

As promised, I tagged (and uploaded to debian experimental) 0.19~rc1.

One slightly intrusive change during the release wrangling is that I
made the LIBNOTMUCH_MAJOR_VERSION in lib/notmuch.h match the
SOVERSION. Somewhat surprising this didn't break anything before.

d