* (bug 2223) Add unique index on user_name field to prevent duplicate accounts
* (bug 1976) fix shared user database with a table prefix set
* (bug 2334) Accept null for attribs in wfElement without PHP warning
+* (bug 2309) Allow templates and template parameters in HTML attribute zone,
+ with proper validation checks. (regression from fix for 2304)
+* Disallow close tags and enforce empty tags for <hr> and <br>
=== Caveats ===