Option to create the character deaf

Allows creating your character permanently deaf,
for that added challenge.

Breaks saves.

src/topten.c

@@ -591,6 +591,7 @@ encode_extended_conducts(char *buf)
     if (sokoban_in_play())
         add_achieveX(buf, "sokoban",  !u.uconduct.sokocheat);
     add_achieveX(buf, "blind",        u.uroleplay.blind);
+    add_achieveX(buf, "deaf",         u.uroleplay.deaf);
     add_achieveX(buf, "nudist",       u.uroleplay.nudist);
     add_achieveX(buf, "bonesless",    !flags.bones);