This installer allows the Installation and Removal of the isfshax superblock to/from the SLC.
The installer searches for superblock.img and superblock.img.sha on the SD. The install will fail if not both files are present.
It can either be launched by fw_img loader or from minute. fw_img loader reguires the fw.img to be build encrypted. For launching it from minute it needs to be built without encryption (no_crypto = False in castify.py)
When launched on a defused console you need a otp.bin which contains at least the SLC key and the SLC hmackey.