monk's to-hit penalty for wearing a suit

If hero is a monk who is wearing a suit, have ^X mention the to-hit
penalty for that in the status section even though it isn't a normal
status line item.  Combat feedback makes it annoyingly obvious, but
player might forget if MSGTYPE=hide is used to suppress the "Your
armor is rather cumbersome..." message.

include/flag.h

@@ -238,6 +238,7 @@ struct instance_flags {
                                * disable to avoid excessive noise when using
                                * a screen reader (use ^X to review status) */
     boolean toptenwin;        /* ending list in window instead of stdout */
+    boolean tux_penalty;      /* True iff hero is a monk and wearing a suit */
     boolean use_background_glyph; /* use background glyph when appropriate */
     boolean use_menu_color;   /* use color in menus; only if wc_color */
 #ifdef STATUS_HILITES