Forum search is back

I'm happy to announce that forum search functionality is now re-enabled. Forum search has always been very slow, and after the site upgrade it was causing major database problems. I have re-implemented it in a new way that is MUCH faster by using a dedicated search engine instead of just plowing through the database looking for a message.

Please let me know if you are experiencing any issues with search or other parts of the site by posting to the bug report forum thread.