If `fss0=` key is detected, sept will be loaded from fusee-secondary.bin instead of `sept/sept_*`.
This will negate missing sept and failed to decrypt pkg2 errors, when booting HOS, for users that forget to update sept folder.
- Still compatible with old hekate.
- Allows for hotfix control
- Sept is now copied from actual running payload, negating the need to check update.bin
- If a foreign payload is found in sept then it is renamed and hekate copies itself. After sept run, it renames it back and continues with boot.
