XWIKI-22222: Add the concept of "request effective author"

* Update since version

(cherry picked from commit 01542b3c)

xwiki-platform-core/xwiki-platform-oldcore/src/main/java/com/xpn/xwiki/web/XWikiRequest.java

@@ -40,9 +40,9 @@ public interface XWikiRequest extends HttpServletRequest
      *         triggered by this request. If the request doesn't indicate an effective author then the user that gets
      *         authenticated with the information provided by this request (or the guest user, if authentication
      *         information is missing) should be considered the effective author.
-     * @since 15.10.11
+     * @since 15.10.12
      * @since 16.4.1
-     * @since 16.5.0
+     * @since 16.6.0RC1
      */
     @Unstable
     default Optional<UserReference> getEffectiveAuthor()

xwiki-platform-core/xwiki-platform-oldcore/src/main/java/org/xwiki/internal/web/EffectiveAuthorSetterListener.java

@@ -42,9 +42,9 @@
  * set already by another component.
  *
  * @version $Id$
- * @since 15.10.11
+ * @since 15.10.12
  * @since 16.4.1
- * @since 16.5.0
+ * @since 16.6.0RC1
  */
 @Component
 @Singleton