v1 was here:
https://www.redhat.com/archives/libguestfs/2019-July/thread.html#00231
The changes address everything that Eric picked up in his review of
the first two patches. I have also added two more patches (4 and 5)
which respectively fix docs and change int status -> unsigned status,
as discussed.
Passes make, check, check-valgrind.
Rich.