websudo annotation backwards compatibility (Confluence 3.3)

Following this guide, I started to use the websudo annotations to secure an XWork action that would process a form in the space admin tab.

The plugin is meant to work with Confluence 3.3 and I haven't released a public version of it yet (it's being developed). After the annotations were moved to SAL (in Confluence 3.4-m3?), I am seeing this problem.

• If I replace the websudo annotations from Confluence 3.3 in the plugin with those from SAL, the plugin probably won't work in Confluence 3.3
• If I don't replace the annotations, the plugin won't work in Confluence 3.4.

It would be great if Confluence could provide a backwards compatible way of securing such XWork actions.