Accessibility: lookaround command, mention_map option

Adds a new extended command #lookaround, which will describe
the map around the hero they can see or remember.

Adds a new boolean option mention_map, which will give a message
when an interesting map location in sight changes.

include/extern.h

@@ -324,6 +324,7 @@ extern char *cmd_from_ecname(const char *);
 extern const char *cmdname_from_func(int(*)(void), char *, boolean);
 extern boolean redraw_cmd(char);
 extern const char *levltyp_to_name(int);
+extern int dolookaround(void);
 extern void reset_occupations(void);
 extern void set_occupation(int(*)(void), const char *, cmdcount_nht);
 extern void cmdq_add_ec(int, int(*)(void));
@@ -634,6 +635,7 @@ extern const char *pmname(struct permonst *, int) NONNULLARG1;
 extern const char *mon_pmname(struct monst *) NONNULLARG1;
 extern const char *obj_pmname(struct obj *) NONNULLARG1;
 extern boolean mapxy_valid(coordxy, coordxy);
+extern boolean gather_locs_interesting(coordxy, coordxy, int);
 
 /* ### do_wear.c ### */
 

include/flag.h

@@ -194,6 +194,7 @@ struct accessibility_data {
     boolean mon_notices;   /* msg when hero notices a monster */
     int mon_notices_blocked; /* temp disable mon_notices */
     boolean mon_movement;  /* msg when hero sees monster move */
+    boolean glyph_updates; /* msg when map glyphs change */
 };
 
 /* Use notice_mon_off() / notice_mon_on() to temporarily disable

include/optlist.h

@@ -408,6 +408,9 @@ static int optfn_##a(int, int, boolean, char *, char *);
     NHOPTB(mention_decor, Advanced, 0, opt_in, set_in_game,
            Off, Yes, No, No, NoAlias, &flags.mention_decor, Term_False,
            "give feedback when walking over interesting features")
+    NHOPTB(mention_map, Advanced, 0, opt_in, set_in_game,
+           Off, Yes, No, No, NoAlias, &a11y.glyph_updates, Term_False,
+           "give feedback when interesting map locations change")
     NHOPTB(mention_walls, Advanced, 0, opt_in, set_in_game,
            Off, Yes, No, No, NoAlias, &flags.mention_walls, Term_False,
            "give feedback when walking into walls")