The darkbot repository contains:
- source/: the source code
- dat/: the configuration
- build/: the built version
As dat/ is handled in Git, we can't clone this repository to be used directly.
So, we're going to clone it and maintain a build in /opt/darkbot.
Then, we'll deploy our own configuration to /opt/odderon.
This change handles the /opt/darkbot clone and compile part.
Ref T1129.