[Libvir] PATCH: 5/10: public auth callback API

[Richard W.M. Jones]

Daniel P. Berrange wrote:
>  virConnectPtr           virConnectOpenAuth      (const char *name,
>  						 virConnectAuthPtr auth,
>  						 int flags);

I'm a fan of callers passing in the size of the structure (as they see 
it).  Allows the structure to be expanded in future, and if done right 
can allow both forwards and backwards compatibility.

cf: http://www.libvirt.org/html/libvirt-libvirt.html#virDomainInterfaceStats

Rich.

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