change node socket to vector; try lock free queue.

lichao

2021-04-21 3931f83205f153f2bc7fc36d1a894cdc3f14b4db

 src/failed_msg.h

@@ -23,6 +23,7 @@
#include "timed_queue.h"
#include <string>

//TODO change storage to map<Remote,list<TimedData<Msg>>>, to avoid retry failed remotes messages.
class FailedMsgQ
{
   typedef std::function<bool(void *)> Func;