SPDX standardizes how source code conveys its copyright and licensing
information. See https://spdx.github.io/spdx-spec/1-rationale/ . SPDX
tags are adopted in many large projects, including things like the Linux
kernel.
Doing pretty much anything in the controller config breaks NetPlay
(desync and/or deadlock), as saving the settings reconfigures
controller interfaces, which NetPlay doesn't expect.
