issue when opening and closing many streams

[whyrusleeping]

A stream muxer stress test i have fails when using muxado, it appears to hang after opening and closing a certain number of streams.

To reproduce:

go get -u github.com/whyrusleeping/go-smux-muxado
cd $GOPATH/src/github.com/whyrusleeping/go-smux-muxado && go test

To make the problem a little more visible, add this print line to jbenet/go-stream-muxer:

diff --git a/test/ttest.go b/test/ttest.go
index d7523b5..29ebb79 100644
--- a/test/ttest.go
+++ b/test/ttest.go
@@ -348,6 +348,7 @@ func SubtestStreamOpenStress(t *testing.T, tr smux.Transport) {
        for i := 0; i < count*5; i++ {
                select {
                case <-recv:
+                       fmt.Println("got stream: ", i)
                case <-limit:
                        t.Fatal("timed out receiving streams")
                }