Advanced search v4.1 changes: Added Method to options page.
Advanced search v4.0 changes: Now defaults to Post content when entering search criteria.
Advanced search v3.8 changes: Updated template variable.
Advanced search v3.7 changes: Fixed post date when showing results by post content.
Advanced search v3.4 changes: Search forums now excludes "Link forum" type of forums.
Advanced search v3.3 changes: Now excludes posts which are in a soft deleted thread.
Advanced search v3.0 changes: Remove no longer used template code and phrases.
