SmartOS/live 74e8e76. TODO, overlay/generic/lib/sdc usb-key.sh

rm code review
Add routines to usb-key.sh needed for initial setup (joysetup.sh)
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+85-29overlay/generic/lib/sdc/usb-key.sh
+18-15tools/format_image/format_image.c
+5-3tools/format_image/Makefile
+4-3tools/build_boot_image
+4-2TODO
+116-525 files

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