[PATCH] fix xl.cfg docs to correct viridian defaults list

[James Dingwall <james-xen@xxxxxxxxxxxxxx>]

Hi,

I was trying to work out why this would cause my Windows 10 guest to hang
when it should have been equivalent to ['defaults'] or 1.

viridian = ['base', 'freq', 'apic_assist', 'crash_ctl', 'no_vp_limit', 
'cpu_hotplug', 'time_ref_count', 'stimer']

Checking the libxl sources show that in fact the defaults are:

    if (libxl_defbool_val(info->u.hvm.viridian)) {
        /* Enable defaults */
        libxl_bitmap_set(&enlightenments, LIBXL_VIRIDIAN_ENLIGHTENMENT_BASE);
        libxl_bitmap_set(&enlightenments, LIBXL_VIRIDIAN_ENLIGHTENMENT_FREQ);
        libxl_bitmap_set(&enlightenments, 
LIBXL_VIRIDIAN_ENLIGHTENMENT_TIME_REF_COUNT);
        libxl_bitmap_set(&enlightenments, 
LIBXL_VIRIDIAN_ENLIGHTENMENT_APIC_ASSIST);
        libxl_bitmap_set(&enlightenments, 
LIBXL_VIRIDIAN_ENLIGHTENMENT_CRASH_CTL);
        libxl_bitmap_set(&enlightenments, 
LIBXL_VIRIDIAN_ENLIGHTENMENT_NO_VP_LIMIT);
        libxl_bitmap_set(&enlightenments, 
LIBXL_VIRIDIAN_ENLIGHTENMENT_CPU_HOTPLUG);
    }

LIBXL_VIRIDIAN_ENLIGHTENMENT_STIMER was removed as a default enlightement in
e83077a3d11072708a5c38fa09fa9d011914e2a1 but the docs were not kept aligned.

Thanks,
James

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