experimental FreeBSD qemu-devel git head port update for testing

[Sebastian Herbszt]

This change seems wrong:

 +    if (ifname == NULL && (ifname = pcap_lookupdev(errbuf)) == NULL) {
-+      fprintf(stderr, "qemu: pcap_lookupdev: %s\n", errbuf);
++      fprintf(stderr, "qemu: pcap_create: %s\n", errbuf);
 +      goto fail;
 +    }

- Sebastian