Option to create the character deaf

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

Breaks saves.

src/insight.c

@@ -2013,6 +2013,8 @@ show_conduct(int final)
 
     if (u.uroleplay.blind)
         you_have_been("blind from birth");
+    if (u.uroleplay.deaf)
+        you_have_been("deaf from birth");
     if (u.uroleplay.nudist)
         you_have_been("faithfully nudist");