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.

include/wintty.h

@@ -222,6 +222,10 @@ E void NDECL(tty_end_screen);
 
 E void FDECL(genl_outrip, (winid,int));
 
+E char *FDECL(tty_getmsghistory, (BOOLEAN_P));
+E void FDECL(tty_putmsghistory, (const char *));
+
+
 #ifdef NO_TERMS
 # ifdef MAC
 #  ifdef putchar