sector granularity for both offset and length. Have all schemes use mkimg_write() instead of mkimg_seek() followed by write(2). Now that schemes don't use lseek(2) nor write(2) directly, it's easier to support output formats other than raw disks.
1. DOSPTYP_FAT32 is not defined in <sys/diskmbr.h> 2. uuid_enc_le() does not exist in libc.
The partitioning scheme can be one of the schemes supported by gpart. Reviewed by: sjg Obtained from: Juniper Networks, Inc.
