rename 'tell public' to something else, so it doesn’t collide with a player name.

(yeah I’m watching at least two people right now with very unfortunate name choices. Also, whoever is named 'broadcast' owes me a beer.)

code/chat.js

@@ -523,7 +523,7 @@ window.chat.chooser = function(event) {
 
     case 'public':
       span.css('cssText', 'color: red !important');
-      span.text('tell public:');
+      span.text('broadcast:');
       elm = $('#chatpublic');
       break;