Edit the search method and search index used.
Calculates the size of the current search indexes in use.
Allows to create and delete a fulltext index on the messages table.
Allows to delete a custom index (that CreateMessageIndex() created).
Called by ?action=admin;area=managesearch;sa=method.
Requires the admin_forum permission.
uses ManageSearch template, 'select_search_method' sub-template.