saving message history (trunk only)

On September 11, 2003 "<Someone>" wrote:
> When we're going to have a different save file format, could
> the last messages in the message history be saved as well, so
> ^P would work the same before and after saving (possibly
> including a few less messages to make room for the startup
> messages?).

This seemed like a reasonable request. This patch:
- adds the core support required.
- adds the tty supporting routines.

sys/mac/macwin.c

@@ -2645,6 +2645,8 @@ struct window_procs mac_procs = {
 	0, //    mac_end_screen,
 	genl_outrip,
 	genl_preference_update,
+	genl_getmsghistory,
+	genl_putmsghistory,
 };
 
 /*macwin.c*/