[Libguestfs] sfdisk: No more Cylinder / Head / Sector support in util-linux 2.26 and later

Hi, it was brought to my attention that sfdisk has lost the ability to deal with C/H/S addressing as of util-linux 2.26, so the -C ,-H, -S command line parameters are no longer supported. Should there be a compile-time check based on "sfdisk -h" output that would cause daemon/sfdisk.c to be compiled only if something like the following is present? ,---- | Override the detected geometry using: | -C, --cylinders <number> set the number of cylinders to use | -H, --heads <number> set the number of heads to use | -S, --sectors <number> set the number of sectors to use `---- Cheers, -Hilko