Use the first letter of your name to indicate you are in the middle of
working on something.
+Protocol pieces
+---------------
+
/----- Server, implemented in ttt-server
/ /---- Client, implemented in ttt
S C
3.6.2.1. ERROR NOT_YOUR_TURN
3.6.2.2. ERROR NOT_VALID_MOVE
+Other bits
+----------
+Server log messages should include pid date and time. And server
+should log the fact when it gets terminated by a signal.