* Also: remove some meta maintenance author artifacts for Niklas, SPQRobin, M.M.S., Siebrand, Jhs. Would otherwise have been removed on Betawiki export.
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.
* Used the new functions in the relevant places throughout the core. Where this was not possible, used wfMsgNoTrans() to avoid double-parsing.
* Calling wfEscapeWikiText() on a title before passing it to a message is unnecessary and causes bugs. The best idea is to let the message do its own escaping. Removed wfEscapeWikiText() from the caller of addedwatchtext, removedwatchtext, deletedtext, protect-text, nosuchusershort and movepage-moved. Updated all message files to use <nowiki>$1</nowiki> where appropriate in these messages.
* Removed unnecessary empty message handling from semiprotectedpagewarning
* Removed nonsense warning about the output of wfMsg() not being safe for inclusion in HTML.
* Changed wfShellExec() to use passthru/ob_get_contents instead of exec(). This avoids corruption of whitespace in the response.
* Added $wgValidateAllHtml feature, to optionally validate HTML on output.
* Fixed missing newline in cascadeprotected in MessagesEn.php
* Belatedly updated addedwatchtext to take account of the new "monobook" skin. No unwatch link in the sidebar anymore.
* fix 'mus' UI name
* update a few comments
* add message file for ik, ny, tk, ve (stub imported from Wikipedia projects)
* add message file with fallback 'it' for eml, lld, lmo
