The image compression setting has a noticably detrimental effect on
spice graphics quality. It's meant to be used for spice VDI but the
vast majority of people don't use spice in a way that makes bandwidth
usage matter.
Boxes has already done this for a while as well:
https://mail.gnome.org/archives/commits-list/2013-March/msg14904.html
Turn it off by default if creating the VM on a local connection.
We totally break CLI compat here, but the previous tool wasn't sustainable.
Instead, repurpose the tool as strictly converting external formats
like ovf/vmx to native libvirt XML, and launch the guest.
So we drop vmx/virt-image output, and virt-image input, and a slew of
command line options. I don't think anyone was depending on this in a
scripted fashion, so in practice I don't think anyone will care.
Add much more comprehensive unit tests while we are at it.
Cole Robinson