Re: [libvirt] [PATCHv6 1/5] interface: add udev based backend for virInterface

Add a read-only udev based backend for virInterface. Useful for distros that do not have netcf support yet. Multiple libvirt based utilities use a HAL based fallback when virInterface is not available which is less than ideal. This implements: * virConnectNumOfInterfaces() * virConnectListInterfaces() * virConnectNumOfDefinedInterfaces() * virConnectListDefinedInterfaces() * virConnectListAllInterfaces() * virConnectInterfaceLookupByName() * virConnectInterfaceLookupByMACString() --- Change from v5: * squash the virConnectListAllInterfaces() patch in * rename status enum to virUdevStatus * remove checks that don't print errors as the value is checked elsewhere * provide helpers for NumOfInterfaces/NumOfDefinedInterfaces to reduce code * provide helpers for ListInterfaces/ListDefinedInterfaces to reduce code

+ /* List all interfaces incase we support more filter flags in the future */