util: Improve 512-byte super magic drive header detection
util: Improve 512-byte super magic drive header detection

JoppyFurr/Snepulator,JoppyFurr/Snepulator,JoppyFurr/Snepulator,JoppyFurr/Snepulator,JoppyFurr/Snepulator,JoppyFurr/Snepulator