- Use a common pre-commit config snippet for Ansible projects.
- Use a template for pre-commit GitLab CI job.
- Address some issues raised now by pre-commit.

There's a chicken and egg issue with new servers, Nginx and Let's
Encrypt. The Nginx setup expects an SSL key and certificate and DH
params file. But the Let's Encrypt challenge has to have Nginx running.
So as a bootstrap step, create an SSL key and self-signed certificate.
Nginx will start (although clients over HTTPS will complain, the Let's
Encrypt challenge requires just HTTP) and then I'll be able to pass the
Let's Encrypt challenge.

iproute2 provides iproute.

More appropriate for a standalone setup.

Use the one from https://github.com/xbmc/xbmc/pull/14905 but with slight
tweaks. Keyboard input still isn't working, but it starts up reliably.

Not yet complete, but getting there.

Also, some adaptations for Ansible 2.10.

Renew Let's Encrypt certificates across the fleet.

Roles for bootstrapping Debian, OpenBSD and OpenWRT hosts. Meaning,
being able to run Ansible tasks on them as targets.

- Inventory.
- Config.
- README.
- License.
- gitignore.
- pre-commit.