[PATCH] Allow address scopes for non-link-local addresses

Hi. Here is a small patch which allows non-zero address scopes on non-link-local addresses. This is required to create connections inside a VRF domain, as the Linux kernel documentation states. In combination with multiple RIBs and FIBs, this makes Bird completely VRF-capable. Therefore, this patch is neccessary to integrate Bird in non-trivial routing setups without the use of multiple network namespaces. It would be nice when you accept this patch. Kind regards, Fritz Grimpen