Revert "(bug 53443) disable Special:GlobalAllocation"

This reverts commit 7b9fec7cb84b0ef9ca7ab46edbddb6246c24e786.

There was a misconfiguration which caused a warning for every banner title
displayed on the GlobalAllocation page, this may have been responsible for the
OOM reported in bug 53443.

Change-Id: Ie2ab9b03029a866685d2c1d9b3ab53c3910af705