Forward-/Backward compatibility (from 3.0 on)
Currently base_url is the primary key for a section. It is not posible to have multiple sections with same base_url but different tokens or api version.
I propose to separate endpoint and base_url. Here an example:
[DEFAULT]
endpoint = prod3.0
[prod3.0]
base_url = www-net.scc.kit.edu
version = 3.0
token = <token>
[prod3.1]
base_url = www-net.scc.kit.edu
version = 3.1
token = <token>