* New CL arge `--killswitches-file`. This needs to reference a file either
with an absolute path, or relative to the CWD of the process.
* Internally if the argument is provided it is prefixed with `"file:"` in
order to actually be loaded. This is because `requests` doesn't have an
adapter for `file:` URLs.
* Also fixes a visual bug with reporting of active killswitches. The entire
SingleKill object was used instead of just its `reason` property. mypy
type checks caught this.
These fields will be used for various things moving forward. The
currently intended use is to redact fields when sending data to
inara/edsm/eddn in case Frontier accidentally includes something that is
unwanted