[libvirt] [PATCH v3 0/2] nwfilter: Compare filters for equality when updating

When a filter is updated, compare it and the original one for equality so that unnecessary instantiations of rules can be avoided. v3: - introducing a function to instantiate all running VMs' filters; call it upon nwfilter driver reload - reworked function comparing filters; determining whether two filters are equal now by comparing their XML representations v2: - added a test case for testing virHashEqual Regards, Stefan