Initial check-in of icontext work.

include/config.h

@@ -552,6 +552,14 @@ typedef unsigned char uchar;
 
 #endif
 
+/* PLAYAGAIN support for allowing the game shell to stay open after the player
+ * saves or dies.  This requires that the game engine can be re-entered to
+ * start another game.
+ *
+ * This support does not include supporting playing another game when
+ * a panic has occured due to undetermined state the engine is left in after a
+ * panic */
+/* #define PLAYAGAIN */
 
 /* End of Section 4 */