Diagnose and maybe fix nmap --iflist on bsd

diff --git a/libnetutil/netutil.cc b/libnetutil/netutil.cc
index 28c624c..ce7d92b 100644
--- a/libnetutil/netutil.cc
+++ b/libnetutil/netutil.cc
@@ -1298,6 +1298,9 @@ static int canonicalize_address(const struct sockaddr_storage *ss,
   hints.ai_flags |= AI_NUMERICHOST;

   rc = getaddrinfo(canonical_ip_string, NULL, &hints, &ai);
+  if (rc != 0) {
+      fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rc));
+  }
   if (rc != 0 || ai == NULL)
     return -1;
   assert(ai->ai_addrlen > 0 && ai->ai_addrlen <= (int) sizeof(*output));
@@ -1328,8 +1331,15 @@ static int collect_dnet_interfaces(const struct intf_entry *entry, void *arg) {
        After that we add the aliases one at a time. */
     if (!primary_done) {
       if (addr_ntos(&entry->intf_addr, (struct sockaddr *) &tmpss) == -1) {
+        fprintf(stderr,"primary - trying %s, type %d, addr_type %d\n", entry->intf_name, entry->intf_type, entry->intf_addr.addr_type);
         dcrn->ifaces[dcrn->numifaces].addr.ss_family = 0;
       } else {
+        fprintf(stderr,"primary - Canonicalizing %s, type %d, addr_type %d\n", entry->intf_name, entry->intf_type, entry->intf_addr.addr_type);
+        fprintf(stderr," ai_family = %d, address %s\n", tmpss.ss_family, addr_ntoa(&entry->intf_addr));
+#ifdef AF_LINK
+        if (tmpss.ss_family == AF_LINK)
+            tmpss.ss_familiy = AF_UNSPEC;
+#endif
         rc = canonicalize_address(&tmpss, &dcrn->ifaces[dcrn->numifaces].addr);
         assert(rc == 0);
       }
@@ -1337,8 +1347,11 @@ static int collect_dnet_interfaces(const struct intf_entry *entry, void *arg) {
       primary_done = true;
     } else if (num_aliases_done < entry->intf_alias_num) {
       if (addr_ntos(&entry->intf_alias_addrs[num_aliases_done], (struct sockaddr *) &tmpss) == -1) {
+        fprintf(stderr,"trying %s, type %d, addr_type %d\n", entry->intf_name, entry->intf_type, entry->intf_addr.addr_type);
         dcrn->ifaces[dcrn->numifaces].addr.ss_family = 0;
       } else {
+        fprintf(stderr,"Canonicalizing %s, type %d, addr_type %d\n", entry->intf_name, entry->intf_type, entry->intf_addr.addr_type);
+        fprintf(stderr," ai_family = %d, address %s\n", tmpss.ss_family, addr_ntoa(&entry->intf_addr));
         rc = canonicalize_address(&tmpss, &dcrn->ifaces[dcrn->numifaces].addr);
         assert(rc == 0);
       }