Adds the ability for users to delete their own account (#10664). Can be disabled in application settings.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9417 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/settings/_authentication.html.erb

@@ -10,6 +10,8 @@
                                            [l(:label_registration_manual_activation), "2"],
                                            [l(:label_registration_automatic_activation), "3"]] %></p>
 
+<p><%= setting_check_box :unsubscribe %></p>
+
 <p><%= setting_text_field :password_min_length, :size => 6 %></p>
 
 <p><%= setting_check_box :lost_password, :label => :label_password_lost %></p>