[PATCH] python: support relative path in default database

[David Bremner]

Doan Tran Cong Danh <congdanhqx at gmail.com> writes:

> From notmuch 0.28, notmuch support relative database path in
> notmuch-config(1), but python binding haven't taught this yet.
>
> afew denied to work with a perfectly fine notmuch-config due to this.

pushed to  master

d