o Use DCE compliant UUID functions and provide local
implementations if they don't exist,
o Move dumping of the map to show.c and print the
partition type,
o Some cleanups and rearrangements.
The default GPT partition type is UFS. When no starting block
or size are specified, the tool will create a partition in the
first free space it find (or that fits, depending on the size).
code is directly copied from migrate.c. The intend is to express
migrate in terms of create and add. The functionality to add
partitions is not yet there.