Changed registration username hint on request

templates/dncore/registration.html

@@ -9,7 +9,7 @@
 			<div class="panel-heading">Registration</div>
 			<div class="panel-body">
 				<p>
-				<span class="label label-info">Note:</span> Please choose a sane username.
+				<span class="label label-info">Note:</span> Please choose a username you don't need a username manager for.
 				</p>
 				<form method="POST" action="{% url 'user:register' %}">
 				{% csrf_token %}