Re: [libvirt] PATCH: Don't set ifname or script args for QEMU tap devices

When running QEMU with a type=bridge or type=network interface config, we pass a pre-created TAP device file descriptor, eg -net tap,fd=17,script=,vlan=0,ifname=vnet0 The ifname and script args have always been ignored by all QEMU versions we support. Latest QEMU will now error out if they are set. So this patch drops those two redundant options. NB, then are still set for type=ethernet inteface configs, because in that config we're not creating a TAP device. -net tap,fd=17,vlan=0 There is no impact on test cases, because live TAP devices is something that you can exercise in the test cases.