add some hints to the login view. Fixes #89

nsupdate/accounts/templates/registration/registration_form.html

@@ -35,6 +35,12 @@
   </div>
   <div class="col-lg-6">
     <h2>Register new account</h2>
+    <p>
+        Username: should be related to your <em>person or organisation</em>
+        (not: to the host(s) you want to register).<br>
+        E-Mail address: must be a <em>working</em> one, we'll send you an activation E-Mail there.<br>
+        Password: please use a sane one, we trust youf.
+    </p>
     <form method='post' action=''>{% csrf_token %}
         {{ form|bootstrap }}
         <button type="submit" class="btn btn-primary">{% trans "Send activation email" %}</button>