Added the cancel link on the page for adding CNAME records as well.

binder/templates/bcommon/add_cname_record_form.htm

@@ -64,6 +64,7 @@ Add CNAME record for {{ originating_record }}
   </div>
 
   <button type="submit" class="btn">Save Changes</button>
+  <a href="{% url "zone_list" dns_server=dns_server zone_name=zone_name %}">Cancel</a>
 </form>
 
 {% endblock body %}