multilevel wildcard does not match empty subtree

[pinchpe]

The multi-level wildcard # is not matching an empty subtree. In other words:
A subscription to
/zoo/animal/#

should match

/zoo/animal/zebra
/zoo/animal/elephant
/zoo/animal/bengal/tiger

and it should also match
/zoo/animal
fhmq is not currently handling this case correctly, ie, is not matching /zoo/animal

The following test, which you can run in broker/lib/topics illustrates. (The file is a .go, changed to .txt so could attach)
memtopics_test.txt

[pinchpe]

The fix is very simple but looks like I don't have permissions to push and submit a PR. Here's the patch:

topics $ git diff 53a79caad9f0c09ebc4ce5953bb1c480f6ece5a0 memtopics.go 
diff --git a/broker/lib/topics/memtopics.go b/broker/lib/topics/memtopics.go
index eb81345..012cf3c 100644
--- a/broker/lib/topics/memtopics.go
+++ b/broker/lib/topics/memtopics.go
@@ -244,6 +244,13 @@ func (this *snode) smatch(topic []byte, qos byte, subs *[]interface{}, qoss *[]b
        // let's find the subscribers that match the qos and append them to the list.
        if len(topic) == 0 {
                this.matchQos(qos, subs, qoss)
+
+               // Also need to consider subscribers to the multi-level wildcard since there can be subscribers _both_ to /foo/bar and /foo/bar/#
+               // Note that if a subscriber is subscribed to _both_ topics it is returned twice as it matches both topics.
+               if mwcn, _ := this.snodes[MWC]; mwcn != nil {
+                       mwcn.matchQos(qos, subs, qoss)
+               }
+
                return nil
        }
 

Updated tests: (a .go file which I changed to .txt so could attach)

memtopics_test.txt

[chowyu08]

yes, thanks very much