The MySQL backend, when using temporary tables, does not support referencing
a table which was already open.
http://bugs.mysql.com/bug.php?id=10327
This patch skip BrokenRedirectsPage on MySQL as reported on r102411.
Part of bug 32118: test special pages SQL queries against all supported DB
Still need to add all the other non QueryPage special pages and then setup
jenkins to support other databases.