Fix goroutine leaks in websocket

Gopkg.lock

@@ -1028,7 +1028,7 @@
     "roundrobin",
     "utils"
   ]
-  revision = "7e69a72707cbd367525e3c626be40c4a39454bb2"
+  revision = "af377749f48ff0ae9974b30ce12a816738b94558"
   source = "https://github.com/containous/oxy.git"
 
 [[projects]]

vendor/github.com/vulcand/oxy/forward/fwd.go

@@ -334,8 +334,8 @@ func (f *httpForwarder) serveWebSocket(w http.ResponseWriter, req *http.Request,
 	defer underlyingConn.Close()
 	defer targetConn.Close()
 
-	errClient := make(chan error)
-	errBackend := make(chan error)
+	errClient := make(chan error, 1)
+	errBackend := make(chan error, 1)
 	replicateWebsocketConn := func(dst, src *websocket.Conn, errc chan error) {
 		for {
 			msgType, msg, err := src.ReadMessage()