v2v: -i libvirt: Add whitespace to make the code clearer.
v2v: -i libvirt: Allow map_source* functions to map the format as well as the path.

For ESX we need to map the format (which is usually unspecified) to raw.
v2v: esx: Add / fix ability to import guests from vCenter Server.

See additional information in the manual page for details.
v2v: Fix bugs in conversion when uninstalling VMware drivers.

 - Don't uninstall open-vm-tools (the old virt-v2v didn't).

 - Do fix the library replacement code so it works the same way as
   old virt-v2v.
Version 1.27.32.