Modify kill and exit functions on emacs notmuch mode

[David Bremner]

Tomi Ollila <tomi.ollila at iki.fi> writes:

>
> ... but as someone(tm) may know, everyone have their own workflow
> ( https://xkcd.com/1172/ ) in their notmuch usage -- someone may
> e.g. start writing email based on arbitrary C code buffer, and
> after email send, return to that buffer instead of going to some
> other notmuch buffer.
>

Yeah, that was my first thought on seeing this series; that's actually a
pretty typical workflow for me. But I haven't had a chance to test the
series out yet.

d