spice: core bits

Add -spice command line switch.  Has support setting passwd and port for
now.  With this patch applied the spice client can successfully connect
to qemu.  You can't do anything useful yet though.

qemu-config.c

@@ -351,6 +351,24 @@ static QemuOptsList qemu_cpudef_opts = {
     },
 };
 
+QemuOptsList qemu_spice_opts = {
+    .name = "spice",
+    .head = QTAILQ_HEAD_INITIALIZER(qemu_spice_opts.head),
+    .desc = {
+        {
+            .name = "port",
+            .type = QEMU_OPT_NUMBER,
+        },{
+            .name = "password",
+            .type = QEMU_OPT_STRING,
+        },{
+            .name = "disable-ticketing",
+            .type = QEMU_OPT_BOOL,
+        },
+        { /* end if list */ }
+    },
+};
+
 static QemuOptsList *vm_config_groups[32] = {
     &qemu_drive_opts,
     &qemu_chardev_opts,