RELEASE-NOTES-1.31

   1 == MediaWiki 1.31 ==
   2
   3 THIS IS NOT A RELEASE YET
   4
   5 MediaWiki 1.31 is an alpha-quality branch and is not recommended for use in
   6 production.
   7
   8 === Configuration changes in 1.31 ===
   9 * $wgEnableAPI and $wgEnableWriteAPI are now deprecated and will be removed in
  10   a future version. The API is now considered to be stable, secure and
  11   essential.
  12 * $wgUsejQueryThree was removed, as it is now the default. This was documented as a
  13   temporary variable during the migration period, deprecated since 1.29.
  14 * $wgLogoHD has been updated to support svg images and uses $wgLogo where
  15   possible for fallback images such as png.
  16 * (T44246) $wgFilterLogTypes will no longer ignore 'patrol' when user does
  17   not have the right to mark things patrolled.
  18 * Wikis that contain imported revisions or CentralAuth global blocks should run
  19   maintenance/cleanupUsersWithNoId.php.
  20 * $wgResourceLoaderMinifierStatementsOnOwnLine and $wgResourceLoaderMinifierMaxLineLength
  21   were removed (deprecated since 1.27).
  22 * (T180921) $wgReferrerPolicy now supports having fallbacks for browsers that are not
  23   using the latest version of the Referrer Policy specification.
  24 * $wgFragmentMode is now set to [ 'legacy', 'html5' ] by default. This is a first step of
  25   migration to human-readable section IDs that will later result in 'html5' being the
  26   default mode.
  27 * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
  28   as upstream is inactive and has no plans to move to PHP 7.
  29 * The old CategorizedRecentChanges feature, including its related configuration
  30   option $wgAllowCategorizedRecentChanges, has been removed.
  31 * (T188472) The 'comma' value for $wgArticleCountMethod is no longer supported for
  32   performance reasons, and installations with this setting will now work as if it
  33   was configured with 'any'.
  34 * (T185753) MediaWiki now defaults to using RemexHtml to tidy up user input, rather than
  35   being off by default. If you wish to disable HTML tidying entirely, set $wgTidyConfig
  36   to null; if you wish to use the old, deprecated Tidy external binary, both
  37   set $wgTidyConfig to null and also set $wgUseTidy to true.
  38 * $wgLogAutopatrol now defaults to false instead of true.
  39 * $wgValidateAllHtml was removed and will be ignored.
  40
  41 === New features in 1.31 ===
  42 * (T76554) User sub-pages named ….json are now protected in the same way that ….js
  43   and ….css pages are, so that configuration options can safely be placed there.
  44 * Wikimedia\Rdbms\IDatabase->select() and similar methods now support
  45   joins with parentheses for grouping.
  46 * As a first pass in standardizing dialog boxes across the MediaWiki product,
  47   Html class now provides helper methods for messageBox, successBox, errorBox and
  48   warningBox generation.
  49 * (T9240) Imports will now record unknown (and, optionally, known) usernames in
  50   a format like "iw>Example".
  51 * (T20209) Linker (used on history pages, log pages, and so on) will display
  52   usernames formed like "iw>Example" as interwiki links, as if by wikitext like
  53   [[iw:User:Example|iw>Example]].
  54 * (T111605) The 'ImportHandleUnknownUser' hook allows extensions to auto-create
  55   users during an import.
  56 * Added a hook, ParserOutputPostCacheTransform, to allow extensions to affect
  57   the ParserOutput::getText() post-cache transformations.
  58 * Added a hook, UploadForm:getInitialPageText, to allow extensions to alter the
  59   initial page text for file uploads.
  60 * (T181651) The info page for File pages now displays the file's base-16 SHA1
  61   hash value in the table of basic information.
  62 * Style tags with a 'data-mw-deduplicate' attribute will be deduplicated as a
  63   ParserOutput::getText() post-cache transformation. This may be disabled by
  64   passing 'deduplicateStyles' => false to that method.
  65 * The identity of the logged-in or IP "actor" for logged actions is being moved
  66   into a new actor table, with the rows in tables such as revision and logging
  67   referring to the actor ID instead of storing the user ID and name/IP in
  68   every row.
  69   * This is currently gated by $wgActorTableSchemaMigrationStage. Most wikis
  70     can set this to MIGRATION_NEW and run maintenance/migrateActors.php as
  71     soon as any necessary extensions are updated.
  72   * Most code accessing rows for logged actions from the database should use
  73     the relevant getQueryInfo() methods to get the information needed to build
  74     the SQL query. The ActorMigration class may also be used to get feature-flagged
  75     information needed to access actor-related fields during the migration
  76     period.
  77 * Added Wikimedia\Rdbms\IDatabase::cancelAtomic(), to roll back an atomic
  78   section without having to roll back the whole transaction.
  79 * Wikimedia\Rdbms\IDatabase::doAtomicSection(), non-native ::insertSelect(),
  80   and non-MySQL ::replace() and ::upsert() no longer roll back the whole
  81   transaction on failure.
  82 * (T189785) Added a monthly heartbeat ping to the pingback feature.
  83 * The CLI installer (maintenance/install.php) learned to detect and include
  84   extensions. Pass --with-extensions to enable that feature.
  85 * (T184791) rc_patrolled now has three states: "0" for unpatrolled,
  86   "1" for manually patrolled and "2" for autopatrolled actions.
  87 * Extensions can now set their type to "editor" if they provide an editor
  88   or enhance the editing experience.
  89 * Extensions can use a PSR-4 autoloader by setting an "AutoloadNamespaces" property
  90   in extension.json. See
  91   <https://www.mediawiki.org/wiki/Manual:Extension.json/Schema#AutoloadNamespaces>
  92   for more details and an example.
  93
  94 === External library changes in 1.31 ===
  95
  96 ==== Upgraded external libraries ====
  97 * Updated jquery.chosen from v0.9.14 to v1.8.2.
  98 * Updated composer/spdx-licenses from 1.1.4 to
  99   1.3.0 (development dependency).
 100 * Updated nikic/php-parser from 2.1.0 to 3.1.3
 101   (development dependency).
 102 * Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
 103 * Updated wikimedia/relpath from 2.0.0 to 2.1.1.
 104 * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
 105 * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
 106 * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 107 * Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.5.
 108 * Updated wikimedia/remex-html from 1.0.2 to 1.0.3.
 109 * …
 110
 111 ==== New external libraries ====
 112 * Added wikimedia/object-factory 1.0.0
 113 * …
 114
 115 ==== Removed and replaced external libraries ====
 116 * (T17845) The deprecated 'jquery.badge' module was removed.
 117 * The deprecated 'jquery.autoEllipsis' module was removed. Use the CSS
 118   text-overflow property instead.
 119 * The deprecated 'jquery.placeholder' module was removed.
 120 * The deprecated 'jquery.appear' module was removed. Use the
 121   'mediawiki.viewport' module instead.
 122 * The deprecated 'mediawiki.widgets.CategorySelector' module alias was removed.
 123   Use the 'mediawiki.widgets.CategoryMultiselectWidget' module directly instead.
 124
 125 === Bug fixes in 1.31 ===
 126 * (T90902) Non-breaking space in header ID breaks anchor
 127
 128 === Action API changes in 1.31 ===
 129 * (T185058) The 'name' value to tgprop for action=query&list=tags has been
 130   removed. It has never made a difference in the output, the name was always
 131   returned regardless.
 132
 133 === Action API internal changes in 1.31 ===
 134 * ApiBase::getProfileDBTime was removed (deprecated since 1.25)
 135 * ApiBase::getModuleProfileName was removed (deprecated since 1.25)
 136 * ApiBase::getProfileTime was removed (deprecated since 1.25)
 137
 138 === Languages updated in 1.31 ===
 139 MediaWiki supports over 350 languages. Many localisations are updated
 140 regularly. Below only new and removed languages are listed, as well as
 141 changes to languages because of Phabricator reports.
 142
 143 * (T180052) Mirandese (mwl) now supports gendered NS_USER/NS_USER_TALK namespaces.
 144 * (T182305) New language support: Nyungar (nys).
 145 * (T186359) New language support: Siberian Tatar [cебертатар] (sty).
 146 * (T186635) New language support: Guianan Creole (gcr).
 147 * (T186647) New language support: Kumyk [къумукъ] (kum).
 148 * (T187750) New language support: Spanish formal address (es-formal).
 149 * (T187824) New language support: Hungarian formal address (hu-formal).
 150
 151 === Breaking changes in 1.31 ===
 152 * MessageBlobStore::insertMessageBlob() (deprecated in 1.27) was removed.
 153 * The OutputPage class constructor now requires a context parameter,
 154   (instantiating without context was deprecated in 1.18)
 155 * The mw.page JavaScript singleton (deprecated in 1.30) was removed.
 156 * Article::getLastPurgeTimestamp(), WikiPage::getLastPurgeTimestamp(), and the
 157   related WikiPage::PURGE_* constants, deprecated in 1.29, were removed.
 158 * The Article::selectFields(), Article::onArticleCreate(),
 159   Article::onArticleDelete(), and Article::onArticleEdit() methods, deprecated
 160   in 1.24, were removed.
 161 * Installer::locateExecutable() and Installer::locateExecutableInDefaultPaths()
 162   were removed, use ExecutableFinder::findInDefaultPaths() instead.
 163 * The deprecated MW_DIFF_VERSION constant was removed.
 164   DifferenceEngine::MW_DIFF_VERSION should be used instead.
 165 * Due to significant refactoring, method ContribsPager::getUserCond() that had
 166   no access restriction has been removed.
 167 * The Block class will no longer accept usable-but-missing usernames for
 168   'byText' or ->setBlocker(). Callers should either ensure the blocker exists
 169   locally or use a new interwiki-format username like "iw>Example".
 170 * The following methods and constants from the WatchedItem class, which were deprecated in
 171   1.27, have been removed.
 172   * WatchedItem::getTitle()
 173   * WatchedItem::fromUserTitle()
 174   * WatchedItem::addWatch()
 175   * WatchedItem::removeWatch()
 176   * WatchedItem::isWatched()
 177   * WatchedItem::duplicateEntries()
 178   * WatchedItem::IGNORE_USER_RIGHTS
 179   * WatchedItem::CHECK_USER_RIGHTS
 180   * WatchedItem::DEPRECATED_USAGE_TIMESTAMP
 181 * The $statementsOnOwnLine parameter of JavaScriptMinifier::minify was removed.
 182   The corresponding configuration variable ($wgResourceLoaderMinifierStatementsOnOwnLine)
 183   has been deprecated since 1.27 and was removed as well.
 184 * The $maxLineLength parameter of JavaScriptMinifier::minify was removed.
 185   The corresponding configuration variable ($wgResourceLoaderMinifierMaxLineLength)
 186   has been deprecated since 1.27 and was removed as well.
 187 * The HtmlFormatter class was removed (deprecated in 1.27). The namespaced
 188   HtmlFormatter\HtmlFormatter class should be used instead.
 189 * The driver 'mysql' for MySQL, deprecated in MediaWiki 1.30, has been removed.
 190   The driver has been deprecated since PHP 5.5 and was removed in PHP 7.0. The
 191   default driver for MySQL has been 'mysqli' since MediaWiki 1.22.
 192 * The following properties of PreparedEdit were deprecated in 1.21 and have been removed:
 193   * PreparedEdit->newText
 194   * PreparedEdit->oldText
 195   * PreparedEdit->pst
 196 * ParserOutput objects generated using a non-default value for
 197   ParserOptions::setWrapOutputClass() can no longer be added to the parser cache.
 198 * The following deprecated methods from the OutputPage class have been removed:
 199   * OutputPage::addExtensionStyle(); deprecated in 1.27
 200   * OutputPage::getExtStyle(); deprecated in 1.27
 201   * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
 202   * OutputPage::setSquidMaxage(); deprecated in 1.27
 203   * OutputPage::readOnlyPage(); deprecated in 1.25
 204   * OutputPage::rateLimited(); deprecated in 1.25
 205   * Additionally, the protected OutputPage::$mExtStyles array, only accessed through
 206     the above and with no known uses, was removed.
 207 * The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
 208 * The following variables and methods in EditPage, deprecated in MediaWiki 1.30, were removed:
 209   * $isCssJsSubpage — use ::isUserConfigPage()
 210   * $isCssSubpage — use ::isUserCssConfigPage()
 211   * $isJsSubpage — use ::isUserJsConfigPage()
 212   * $isWrongCaseCssJsPage – use ::isWrongCaseUserConfigPage()
 213   * ::getSummaryInput() – use ::getSummaryInputWidget()
 214   * ::getSummaryInputOOUI() – use ::getSummaryInputWidget()
 215   * ::getCheckboxes() – use ::getCheckboxesWidget() or ::getCheckboxesDefinition()
 216   * ::getCheckboxesOOUI() – use ::getCheckboxesWidget() or ::getCheckboxesDefinition()
 217 * The method ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
 218 * In User, the cookie-related methods which were wrappers for the functions on the response
 219   object, and were deprecated in 1.27, have been removed:
 220   * ::setCookie()
 221   * ::clearCookie()
 222   * ::setExtendedLoginCookie()
 223   Note that User::setCookies() remains, and is not deprecated.
 224 * Also in User, some auth-related methods which were deprecated in 1.27, have been removed:
 225   * ::getEditTokenTimestamp() – use MediaWiki\Session\Token::getTimestamp()
 226   * ::getPasswordFactory() – create a PasswordFactory directly
 227   * ::passwordChangeInputAttribs()
 228 * The global functions wfProfileIn and wfProfileOut, deprecated in 1.25, have been removed.
 229 * SpecialPageFactory::getList(), deprecated in 1.24, has been removed. You can
 230   use ::getNames() instead.
 231 * OpenSearch::getOpenSearchTemplate(), deprecated in 1.25, has been removed. You
 232   can use ApiOpenSearch::getOpenSearchTemplate() instead.
 233 * The global function wfBaseConvert, deprecated in 1.27, has been removed. Use
 234   Wikimedia\base_convert() directly.
 235 * Calling Database::begin() explicitly during an implicit transaction or when DBO_TRX
 236   is set results in an exception. Calling Database::commit() explicitly for an implicit
 237   transaction also results in an exception. Previously these were logged as errors.
 238   The startAtomic() and endAtomic() methods, or AtomicSectionUpdate should be used
 239   instead.
 240 * The global function wfOutputHandler() was removed, use the its replacement
 241   MediaWiki\OutputHandler::handle() instead. The global function was only sometimes defined.
 242   Its replacement is always available via the autoloader.
 243 * ChangeTags::listExtensionActivatedTags and ::listExtensionDefinedTags, deprecated
 244   in 1.28, have been removed.  Use ::listSoftwareActivatedTags() and
 245   ::listSoftwareDefinedTags() instead.
 246 * Title::getTitleInvalidRegex(), deprecated in 1.25, has been removed. You
 247   can use MediaWikiTitleCodec::getTitleInvalidRegex() instead.
 248 * HTMLForm & VFormHTMLForm::isVForm(), deprecated in 1.25, have been removed.
 249 * The ProfileSection class, deprecated in 1.25 and unused, has been removed.
 250 * The ResourceLoaderGetLessVars hook, deprecated in 1.30, has been removed.
 251   Use ResourceLoaderModule::getLessVars() to expose local variables instead
 252   of global ones.
 253 * As part of work to modernise user-generated content clean-up, a config option and some
 254   methods related to HTML validity were removed without deprecation. The public methods
 255   MWTidy::checkErrors() and its callee TidyDriverBase::validate() are removed, as are
 256   MediaWikiTestCase::assertValidHtmlSnippet() and ::assertValidHtmlDocument(). The
 257   $wgValidateAllHtml configuration option is removed and will be ignored.
 258 * Execution of external programs using MediaWiki\Shell\Command now applies RESTRICT_DEFAULT
 259   Firejail restriction by default.
 260 * The ResourceLoaderModule::getHashMtime() and ::getDefinitionMtime() methods,
 261   deprecated in 1.26, were removed.
 262
 263 === Deprecations in 1.31 ===
 264 * The Revision class was deprecated in favor of RevisionStore, BlobStore, and
 265   RevisionRecord and its subclasses.
 266 * The global function wfBCP47 is deprecated in favour of LanguageCode::bcp47.
 267 * The global function wfCountDown is now deprecated in favor of Maintenance::countDown.
 268 * Several methods for returning lists of fields to select from the database
 269   have been deprecated in favor of similar methods that also return the tables
 270   to select from and the join conditions for those tables.
 271   * Block::selectFields() → Block::getQueryInfo()
 272   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 273   * ArchivedFile::selectFields() → ArchivedFile::getQueryInfo()
 274   * LocalFile::selectFields() → LocalFile::getQueryInfo()
 275   * LocalFile::getCacheFields() with a prefix no longer works
 276   * LocalFile::getLazyCacheFields() with a prefix no longer works
 277   * OldLocalFile::selectFields() → OldLocalFile::getQueryInfo()
 278   * RecentChange::selectFields() → RecentChange::getQueryInfo()
 279   * Revision::userJoinCond() → Revision::getQueryInfo( [ 'user' ] )
 280   * Revision::selectUserFields() → Revision::getQueryInfo( [ 'user' ] )
 281   * Revision::pageJoinCond() → Revision::getQueryInfo( [ 'page' ] )
 282   * Revision::selectPageFields() → Revision::getQueryInfo( [ 'page' ] )
 283   * Revision::selectTextFields() → Revision::getQueryInfo( [ 'text' ] )
 284   * Revision::selectFields() → Revision::getQueryInfo()
 285   * Revision::selectArchiveFields() → Revision::getArchiveQueryInfo()
 286   * User::selectFields() → User::getQueryInfo()
 287   * WikiPage::selectFields() → WikiPage::getQueryInfo()
 288 * Revision::setUserIdAndName() was deprecated.
 289 * Access to TitleValue class properties was deprecated, the relevant getters
 290   should be used instead.
 291 * DifferenceEngine::getDiffBodyCacheKey() is deprecated. Subclasses should
 292   override DifferenceEngine::getDiffBodyCacheKeyParams() instead.
 293 * Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
 294   Maintenance::fatalError() instead.
 295 * Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
 296 * The RevisionInsertComplete hook is now deprecated, use RevisionRecordInserted instead.
 297   RevisionInsertComplete is still called, but the second and third parameter will always be null.
 298   Hard deprecation is scheduled for 1.32.
 299 * The following methods that get and set ParserOutput state are deprecated.
 300   Callers should use the new stateless $options parameter to
 301   ParserOutput::getText() instead.
 302   * ParserOptions::getEditSection()
 303   * ParserOptions::setEditSection()
 304   * ParserOutput::getEditSectionTokens()
 305   * ParserOutput::setEditSectionTokens()
 306   * ParserOutput::getTOCEnabled()
 307   * ParserOutput::setTOCEnabled()
 308   * OutputPage::enableSectionEditLinks()
 309   * OutputPage::sectionEditLinksEnabled()
 310   * The public ParserOutput state fields $mTOCEnabled and $mEditSectionTokens are also deprecated.
 311 * License::getLicenses has been deprecated; use License::getLines instead.
 312 * QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
 313   Setting template variables by reference allowed violating the principle of data being
 314   immutable once added to the skin template. In practice, this method was not being
 315   used for that. Rather, setRef() existed as memory optimisation for PHP 4.
 316 * QuickTemplate::setTranslator() was deprecated in favour of Skin::msg() parameters.
 317 * MediaWikiI18N::set() was deprecated in favour of Skin::msg() parameters.
 318 * MediaWikiI18N::translate() was deprecated in favour of Skin::msg() or wfMessage().
 319 * Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
 320   'unwrap' transform to ParserOutput::getText() instead.
 321 * \ObjectFactory (no namespace) is deprecated, the namespaced \Wikimedia\ObjectFactory
 322   from the wikimedia/object-factory library should be used instead.
 323 * CommentStore::newKey is deprecated. Get an instance from MediaWikiServices instead.
 324 * The following CommentStore methods have had their signatures changed to introduce a $key parameter,
 325   usage of the methods on instances retrieved from CommentStore::newKey will remain unchanged but deprecated:
 326   * CommentStore::getFields
 327   * CommentStore::getJoin
 328   * CommentStore::getComment
 329   * CommentStore::getCommentLegacy
 330   * CommentStore::insert
 331   * CommentStore::insertWithTemplate
 332 * The following methods in Title have been renamed, and the old ones are deprecated:
 333   * Title::getSkinFromCssJsSubpage – use ::getSkinFromConfigSubpage
 334   * Title::isCssOrJsPage – use ::isSiteConfigPage
 335   * Title::isCssJsSubpage – use ::isUserConfigPage
 336   * Title::isCssSubpage – use ::isUserCssConfigPage
 337   * Title::isJsSubpage – use ::isUserJsConfigPage
 338 * The following methods related to caching of half-parsed HTML were deprecated:
 339   * Parser::serializeHalfParsedText()
 340   * Parser::unserializeHalfParsedText()
 341   * Parser::isValidHalfParsedText()
 342   * StripState::getSubState()
 343   * StripState::merge()
 344 * The DeferredStringifier class is deprecated, use Message::listParam() instead.
 345 * The type string for the parameter $lang of DateFormatter::getInstance is
 346   deprecated.
 347 * Wikimedia\Rdbms\SavepointPostgres is deprecated.
 348 * The DO_MAINTENANCE constant is deprecated. RUN_MAINTENANCE_IF_MAIN should be
 349   used instead.
 350 * The function wfShellWikiCmd() has been deprecated, use
 351   MediaWiki\Shell::makeScriptCommand().
 352
 353 === Other changes in 1.31 ===
 354 * Browser support for Internet Explorer 10 was lowered from Grade A to Grade C.
 355 * Browser support for Opera 12 and older was removed. Opera 15+ continues at Grade A.
 356 * Introducing multi-content-revision capability into the storage layer. For details,
 357   see <https://www.mediawiki.org/wiki/Requests_for_comment/Multi-Content_Revisions>.
 358 * The "free" CSS class is now only applied to unbracketed URLs in wikitext. Links
 359   written using square brackets will get the class "text" not "free".
 360 * RFC 157418: Whitespace is trimmed from wikitext headings, wikitext list items,
 361   wikitext table captions, wikitext table headings, wikitext table cells. HTML
 362   headings, HTML list items, HTML table captions, HTML table headings, HTML table cells
 363   will not have this trimming behavior.
 364
 365 == Compatibility ==
 366 MediaWiki 1.31 requires PHP 5.5.9 or later. Although HHVM 3.18.5 or later is supported,
 367 it is generally advised to use PHP 5.5.9 or later for long term support.
 368
 369 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 370 but support for them is somewhat less mature. There is experimental support for
 371 Oracle and Microsoft SQL Server.
 372
 373 The supported versions are:
 374
 375 * MySQL 5.0.3 or later
 376 * PostgreSQL 9.2 or later
 377 * SQLite 3.3.7 or later
 378 * Oracle 9.0.1 or later
 379 * Microsoft SQL Server 2005 (9.00.1399)
 380
 381 == Upgrading ==
 382 1.31 has several database changes since 1.30, and will not work without schema
 383 updates. Note that due to changes to some very large tables like the revision
 384 table, the schema update may take quite long (minutes on a medium sized site,
 385 many hours on a large site).
 386
 387 Don't forget to always back up your database before upgrading!
 388
 389 See the file UPGRADE for more detailed upgrade instructions, including
 390 important information when upgrading from versions prior to 1.11.
 391
 392 For notes on 1.30.x and older releases, see HISTORY.
 393
 394 == Online documentation ==
 395 Documentation for both end-users and site administrators is available on
 396 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 397 for pages that explicitly state that their contents are in the public domain):
 398
 399        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 400
 401 == Mailing list ==
 402 A mailing list is available for MediaWiki user support and discussion:
 403
 404        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 405
 406 A low-traffic announcements-only list is also available:
 407
 408        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 409
 410 It's highly recommended that you sign up for one of these lists if you're
 411 going to run a public MediaWiki, so you can be notified of security fixes.
 412
 413 == IRC help ==
 414 There's usually someone online in #mediawiki on irc.freenode.net.