changed explanation text. users may choose any login/pass

examples/html/login.html

@@ -30,9 +30,7 @@
     <center>
       <h2>Mongoose chat server login</h2>
       <div style="max-width: 30em;">
-        Username can be any string that consists of English letters only.
-	The password must be the same as username. Example:
-	username "joe", password "joe". Or, username "Bob", password "Bob".
+        Username and password can be any non-empty strings.
       </div>
       <br/>
       <form>