ServerContext clear timer queue

src/remote/codec.cpp

@@ -47,7 +47,7 @@ namespace {
 struct BreakTransport : TransportSender
 {
     virtual ~BreakTransport() {}
-    virtual void send(epics::pvData::ByteBuffer* buffer, TransportSendControl* control)
+    virtual void send(epics::pvData::ByteBuffer* buffer, TransportSendControl* control) OVERRIDE FINAL
     {
         throw epics::pvAccess::detail::connection_closed_exception("Break");
     }

src/server/serverContext.cpp

@@ -329,6 +329,9 @@ void ServerContextImpl::shutdown()
     // this will also destroy all channels
     destroyAllTransports();
 
+    // drop timer queue
+    _timer.reset();
+
     // response handlers hold strong references to us,
     // so must break the cycles
     _responseHandler.reset();