Command repeating by using cmd queues

This replaces the old pushq/saveq arrays (which were used to save
the keys pressed by the user for repeating a previous command)
with a new command queue.  This means there's no hard-coded limit
to the saved keys, and it can repeat extended commands which are
not bound to any key.

src/dokick.c

@@ -864,7 +864,7 @@ dokick(void)
         You("are too small to do any kicking.");
         no_kick = TRUE;
     } else if (u.usteed) {
-        if (yn_function("Kick your steed?", ynchars, 'y') == 'y') {
+        if (yn_function("Kick your steed?", ynchars, 'y', TRUE) == 'y') {
             You("kick %s.", mon_nam(u.usteed));
             kick_steed();
             return ECMD_TIME;