StripWhitespace maintains old behavior

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.

also make it more thread safe (avoid rare deadlock)
and fix it trying to add devices before the CI has init

where appropriate. SerialInterface was a leftover from the past,
and makes no sense to be used on actual/real controllers.

Continues the migration of the logging calls over to the fmt capable
ones.