Make JSONP support optional and disabled by default (#12992).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11272 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/settings/_authentication.html.erb

@@ -19,6 +19,8 @@
 <p><%= setting_check_box :openid, :disabled => !Object.const_defined?(:OpenID) %></p>
 
 <p><%= setting_check_box :rest_api_enabled %></p>
+
+<p><%= setting_check_box :jsonp_enabled %></p>
 </div>
 
 <fieldset class="box">