Changes to the documentation can be requested to the issue tracker, or added to a page as a comment. To add comments, create an account on the Struts 2 Documentation Confluence space at cwiki.apache.org. A volunteer with page editing privileges can then make the change by referring to the comment. (Confluence sends to the developers mailing list a daily summary of changes, including new comments.)
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Sadly, not everyone can file a CLA. Many organizations still use aggressive IP agreement that assign rights to our every stray thought to the company, 24/7. In fact, some organizations grant a special dispensation for the ASF so that their employees can file CLAs.