xl: long output of "list" command now contains Dom0 information

As we've already generated a JSON config for Dom0, print that out when
requested.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

tools/libxl/xl_cmdimpl.c

@@ -3192,9 +3192,6 @@ static void list_domains_details(const libxl_dominfo *info, int nb_domain)
 
     for (i = 0; i < nb_domain; i++) {
         libxl_domain_config_init(&d_config);
-        /* no detailed info available on dom0 */
-        if (info[i].domid == 0)
-            continue;
         rc = libxl_retrieve_domain_configuration(ctx, info[i].domid, &d_config);
         if (rc)
             continue;