Flush update buffers before sending requests.

This makes sure that any neighbour answering the request has up-to-date
information about us.

message.c

@@ -503,6 +503,10 @@ send_request(struct network *net,
         return;
     }
 
+    /* Make sure any buffered updates go out before this request. */
+    if(!net || update_net == net)
+        flushupdates();
+
     debugf("Sending request to %s for %s (%d hops).\n",
            net->ifname, prefix ? format_prefix(prefix, plen) : "any",
            hop_count);
@@ -568,6 +572,11 @@ send_unicast_request(struct neighbour *neigh,
 {
     unsigned char buf[24];
 
+    /* Make sure any buffered updates go out before this request. */
+    if(update_net == neigh->network)
+        flushupdates();
+    flushbuf(neigh->network);
+
     debugf("Sending unicast request to %s (%s) for %s (%d hops).\n",
            format_address(neigh->id),
            format_address(neigh->address),