Add void support, plus some other updates

install-stuff/install-qemu-libvirt.bash

@@ -26,6 +26,9 @@ elif command_exists "apk"; then
     sudo apk add git
     sudo rc-update add libvirtd
     sudo rc-service libvirtd start
+elif command_exists "xbps-install"; then
+    sudo xbps-install qemu libvirt virt-manager
+    sudo usermod -aG libvirt $(whoami)
 else
     echo "Unsupported: unknown package manager and distro"
 fi