[PATCH 3/3] qemu: capabilities: Re-enable detection of QEMU_CAPS_BLOCK_EXPORT_ADD

[Eric Blake]

On 10/26/20 8:19 AM, Peter Krempa wrote:
> Now that qemu stabilized it's interface and we've switched to the new
> design we can re-enable use of 'block-export-add'
> 
> This reverts commit TBD!!

Cute - but it works!  Obviously, as with 2/3, you'll add S-o-b when the
commit message is fixed.  Code-wise:

Reviewed-by: Eric Blake <eblake at redhat.com>

-- 
Eric Blake, Principal Software Engineer
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