Upgrade notes:
* Index names have changed from hardcoded 'Identica_people' and 'Identica_notices' to use the database name and actual table names. Must reindex.
New events:
* GetSearchEngine to override default search engine class selection from plugins
New scripts:
* gen_config.php generates a sphinx.conf from database configuration (with theoretical support for status_network table, but it doesn't seem to be cleanly queriable right now without knowing the db setup info for that. Needs generalized support.)
* Replaced old sphinx-indexer.sh and sphinx-cron.sh with index_update.php
Other fixes:
* sphinx.conf.sample better matches our live config, skipping unused stopword list and using a more realistic indexer memory limit
Further notes:
* Probably doesn't work right with PostgreSQL yet; Sphinx can pull from PG but the extraction queries currently look like they use some MySQL-specific functions.
* commit 'jeff-themovie/small-fixes':
Fix missing max_id in API search calls
Fix "Trying to get property of non-object" errors when a user tries to log in using an unknown nickname
Fix "Trying to get property of non-object" errors when accessing the people search results page
Fix "Undefined variable: cnt"
Fix "Trying to get property of non-object" errors in groupeditform.php
Fix "Undefined property: DisfavorAction::$id"
If a user does a notice search that should return no matching notices, the RSS feed / API results for that search currently returns all notices instead of no notices. This fixes it so that an empty list is returned instead.
