addr_from_ref
addr_from_ref(const FN_ref_t *ref, const char *cname, addrtype_t *typep,
(addr_from_ref(ref, cname, &addrtype, addrdata, LINESZ) == 0)) {
at_frontier = (addr_from_ref(ref, cname, &addrtype, NULL, 0) == 0);