[libvirt] [PATCH] qemudDomainCreate: also check uuid

[Charles Duffy]

Daniel Veillard wrote:
>   Are you disagreeing with the message (which your patch doesn't fix)
> or with the semantic of the check (and then why allow to create a domain
> reusing the UUID of another defined but not running domain, I can only
> see confusion or security problems in doing so)

The act of creating a domain reusing the UUID of another defined but not 
running domain is presumably an action taken with intent to rename that 
other domain (and thus should undefine the prior domain holding that 
UUID in the process... which, admittedly, the given patch didn't 
explicitly do).

Anyhow, two patches attached; one revises the error messages, while the 
other improves behavior with the semantics I assumed, to explicitly 
undefine any duplicates found during a create; I'm happy with either.
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