Ensures websocket closes on client disconnect.

Change-Id: Icbcad09afdcc6c6e52ef85850145424309ad71e0
diff --git a/services/wsprd/wspr/pipe.go b/services/wsprd/wspr/pipe.go
index 229313b..120d675 100644
--- a/services/wsprd/wspr/pipe.go
+++ b/services/wsprd/wspr/pipe.go
@@ -139,6 +139,7 @@
 func (p *pipe) cleanup() {
 	p.logger.VI(0).Info("Cleaning up websocket")
 	p.controller.Cleanup()
+	p.ws.Close()
 	p.wspr.CleanUpPipe(p.req)
 }