[libvirt] [PATCH 0/3] Cosmetic changes to SPICE QEMU commandline

Hey, I've been trying out the recently adding virgl support, which does not need any TCP port/address to be set (it's directly opening a local unix fd). While looking at QEMU command line in configs such as <graphics type="spice" autoport="no"/>, I've noticed that the QEMU command line gets some 'useless' arguments such as -spice port=0 or -spice addr=127.0.0.1 (without a port defined). This series changes the spice command line generation so that we don't add these arguments when not needed. Christophe