Removing the route scope attribute. Use custom attributes instead.

The route scope attribute was used for simple user route marking. As
there is a better tool for this (custom attributes), the old and limited
way can be dropped.

proto/ospf/rt.c

@@ -2054,7 +2054,6 @@ again1:
     {
       rta a0 = {
 	.source = nf->n.type,
-	.scope = SCOPE_UNIVERSE,
 	.dest = RTD_UNICAST,
 	.nh = *(nf->n.nhs),
       };