[Libguestfs] [PATCH] ovf: Try to set BiosType correctly according to the oVirt sources.

Tomas, what do you think about this? As far as I can tell we are not setting the BiosType correctly in any current scenario. Mostly we set it to "0" (cluster default), and I guess we can get away with that most of the time. For UEFI guests we set it to "2" which simply seems wrong. The patch tries to adjust the BiosType so it actually matches what the oVirt source code says. Am I missing something? Rich.