Loop: xrpld.app xrpld.overlay
  xrpld.app > xrpld.overlay

Loop: xrpld.app xrpld.rpc
  xrpld.rpc > xrpld.app

Loop: xrpld.app xrpld.shamap
  xrpld.shamap > xrpld.app

Loop: xrpld.overlay xrpld.rpc
  xrpld.rpc ~= xrpld.overlay

