* Rename wordSegmentation() to segmentByWord().
* Consolidate search index locking and iteration to Maintenance.php
* Add maintenance/updateDoubleWidthSearch.php to take care of new
format for normalized double-width roman characters.
* Add error checking to updateSearchIndex.php for creating $posFile.
* Add note to UPGRADE about running updateDoubleWidthSearch.php.
Doxygen documentation update:
* Changed alls @addtogroup to @ingroup. @addtogroup adds the comment to the group description, but doesn't add the file, class, function, ... to the group like @ingroup does. See for example http://svn.wikimedia.org/doc/group__SpecialPage.html where it's impossible to see related files, classes, ... that should belong to that group.
* Added @file to file description, it seems that it should be explicitely decalred for file descriptions, otherwise doxygen will think that the comment document the first class, variabled, function, ... that is in that file.
* Removed some empty comments
* Removed some ?>
Added following groups:
* ExternalStorage
* JobQueue
* MaintenanceLanguage
One more thing: there are still a lot of warnings when generating the doc.
