Added a system setting for allowing OpenID logins and registrations

* Defaults to off
* Is set in the Administration panel under Authentication

  #699

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2449 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/settings/_authentication.rhtml

@@ -17,6 +17,9 @@
 
 <p><label><%= l(:label_password_lost) %></label>
 <%= check_box_tag 'settings[lost_password]', 1, Setting.lost_password? %><%= hidden_field_tag 'settings[lost_password]', 0 %></p>
+
+<p><label><%= l(:setting_openid) %></label>
+<%= check_box_tag 'settings[openid]', 1, Setting.openid? %><%= hidden_field_tag 'settings[openid]', 0 %></p>
 </div>
 
 <div style="float:right;">