- Relax sanitazion requirements in libdisk, as a previous commit enabling this   sanitization broke sysinstall on some disks.  This was due to the disks   reporting a geometry that was incorrectly sanitized by sysinstall. This makes   the sanitization consistent with fdisk.
- Relax sanitazion requirements in libdisk, as a previous commit enabling this
  sanitization broke sysinstall on some disks.  This was due to the disks
  reporting a geometry that was incorrectly sanitized by sysinstall. This makes
  the sanitization consistent with fdisk.

Tested by:	randi

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase