Add template events to the header of search_results.html

"I've ported parts of asinshesq's MOD View or mark unread posts. It needs to add a "Mark forums read" link to the search_results.html, right below the "Go to advanced search" link.

I tried to make things a bit cleaner by moving the event outside of the <p> element but the result didn't look quite right, so inside <p> it is. :?

"search_results_posts_to_advanced_search_after" because the event is not triggered for topic searches.

Subsilver2: I'm not familiar with it, and at a quick glance there doesn't seem to be a "Go to advanced search" link in that template file."

Event request from forum topic http://area51.phpbb.com/phpBB/viewtopic.php?f=111&t=46766