Re: [libvirt] PATCH: Fix QEMU security model info after capabilities refresh

A recent patch made the qemudGetCapabilities() method blow away and re-create the QEMU driver's capabilities object. Unfortunately it did not re-initialize the security model capabilities data. It also left open the possibility that the QEMU driver could be left with no active capabilities object at all in the case of OOM. Thus, this patch . - Splits the security capabilities init code out to be callable independantly of init of the security driver itself - Makes qemudGetCapabilities repopopulate security driver info - Don't free the existing capabilities object until we have successfully created a new one