- Add to qvm-run:
- no-gui when command doesn't require a GUI
- filter-escape-chars when pass-io is set and output is not a file,
such as a pipe that could later be used to print information.
- Change remaining echo to printf
- Add end-of-options separator when possible
- Default sys-net and sys-firewall to disposable;
- Set global and per vm preferences by starting the qubes or shutting
down them when necessary; and
- Less manual steps remaining for the user: just rename the net qube, as
it can only be done via Qubes Manager.
