Add support for the upcoming Debian Stretch
*Created by: xmaysonnave*
While installing **ansible-openwisp2** on **Debian Stretch RC1** I face an *uwsgi* crash as ansible fetched uwsgi 2.0.14 from the PyPi repo. The crash is related to an *OpenSSL 1.1* incompatibility.
However while digging and experimenting, Debian successfully installed uwsgi from its own repo.
In order to have a functionnal installation I modified the file :
`/etc/ansible/roles/openwisp.openwisp2/tasks/pip.yml`
with the following informations :
```
- name: Install uwsgi
pip:
name: http://http.debian.net/debian/pool/main/u/uwsgi/uwsgi_2.0.14+20170111.orig.tar.gz
state: latest
virtualenv: "{{ virtualenv_path }}"
virtualenv_python: "{{ openwisp2_python }}"
virtualenv_site_packages: yes
with_items:
- uwsgi
notify: reload supervisor
```
That way pip fetch, build and doesn't complain.
Thanks
issue