message: Revise comments in Ref topology C++
diff: namespace Ref {
  - // TODO
  + // Declare the block driver here so that main can see it
  extern Drv::BlockDriverImpl blockDrv;
  namespace Allocation {
  + // Malloc allcator for topology construction
  extern Fw::MallocAllocator mallocator;
  }
  + // State for topology construction
  struct TopologyState {
  TopologyState() :
  hostName(""),
  @@ -37,6 +39,7 @@ namespace Ref {
  U32 portNumber;
  };
  + // Health ping entries
  namespace PingEntries {
  namespace blockDrv { enum { WARN = 3, FATAL = 5 }; }
  namespace chanTlm { enum { WARN = 3, FATAL = 5 }; }
  