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.

win/gem/wingem.c

@@ -97,7 +97,9 @@ struct window_procs Gem_procs = {
     Gem_start_screen,
     Gem_end_screen,
     Gem_outrip,
-    Gem_preference_update
+    Gem_preference_update,
+    genl_getmsghistory,
+    genl_putmsghistory
 };
 
 #ifdef MAC