message: Fix shutdown hang with >= 8 -addnodes set
  We previously would block waiting for a CSemaphoreGrant in
  ThreadOpenAddedConnections, when we did not need to. This would
  block as the posts in CConnman shutdown were both to the wrong
  semaphore and in the wrong location.
  Github-Pull:
  Rebased-From:
diff: @@ -2321,6 +2321,10 @@ void CConnman::Interrupt()
  if (semOutbound)
  for (int i=0; i<(nMaxOutbound + nMaxFeeler); i++)
  semOutbound->post();
  +
  + if (semAddnode)
  + for (int i=0; i<nMaxAddnode; i++)
  + semAddnode->post();
  }
  void CConnman::Stop()
  @@ -2336,10 +2340,6 @@ void CConnman::Stop()
  if (threadSocketHandler.joinable())
  threadSocketHandler.join();
  - if (semAddnode)
  - for (int i=0; i<nMaxAddnode; i++)
  - semOutbound->post();
  -
  if (fAddressesInitialized)
  {
  DumpData();
  