Use ts_redundancy_packet when appropriate.

.. do not use _signal, it has some issues.

It is possible that the timeout value overflows, and then, the 'now'
timestamp is always larger than the packet timeout. We need a proper
timeout detection.

- add debug domains which enable multiple debugging statements
  collectively
- add a debug domain DEBUG_ALL which enables all debugging messages
- print the debug domain in the debug message
- add some debug statements
- enable some domains

To print the domain, the debug() macro converts the domain into a
string and adds the value 6 to skip the "DEBUG_" prefix.

Use two timestamp tables to distinguish between data and redundancy
packets.

.. and ignore redundancy packets.

 - Implement PrrtTimestamp data structures and functions
 - Add PrrtTimeStampClock and PrrtTimeStampCycle macros where desired
 - Dump timestamp results to stdout

avoid the memory allocation, if wanted.

* Refactor dataReceiver.
* Add packetTimeoutTable.
* Add repairBlockStore.