RELEASE-NOTES-1.34

   1 = MediaWiki 1.34 =
   2
   3 == MediaWiki 1.34.0-PRERELEASE ==
   4
   5 THIS IS NOT A RELEASE YET
   6
   7 MediaWiki 1.34 is an alpha-quality development branch, and is not recommended
   8 for use in production.
   9
  10 == Upgrading notes for 1.34 ==
  11 1.34 has several database changes since 1.33, and will not work without schema
  12 updates. Note that due to changes to some very large tables like the revision
  13 table, the schema update may take quite long (minutes on a medium sized site,
  14 many hours on a large site).
  15
  16 Don't forget to always back up your database before upgrading!
  17
  18 See the file UPGRADE for more detailed upgrade instructions, including
  19 important information when upgrading from versions prior to 1.11.
  20
  21 Some specific notes for MediaWiki 1.34 upgrades are below:
  22
  23 * …
  24
  25 For notes on 1.33.x and older releases, see HISTORY.
  26
  27 === Configuration changes for system administrators in 1.34 ===
  28
  29 ==== New configuration ====
  30 * $wgAllowExternalReqID (T201409) - This configuration setting controls whether
  31   Mediawiki accepts the request ID set by the incoming request via the
  32   `X-Request-Id` header. If set to `true`, that value will be used throughout
  33   the code as the request identificator. Otherwise, the sent header will be
  34   ignored and the request ID will either be taken from Apache's mod_unique
  35   module or will be generated by Mediawiki itself (depending on the set-up).
  36 * $wgEnableSpecialMute (T218265) - This configuration controls whether
  37   Special:Mute is available and whether to include a link to it on emails
  38   originating from Special:Email.
  39
  40 ==== Changed configuration ====
  41 * $wgUseCdn, $wgCdnServers, $wgCdnServersNoPurge, and $wgCdnMaxAge – These four
  42   CDN-related config variables have been renamed from being specific to Squid –
  43   they were previously $wgUseSquid, $wgSquidServers, $wgSquidServersNoPurge, and
  44   $wgSquidMaxage respectively. This aligns them with the related existing
  45   variable $wgCdnMaxageLagged. The previous configuration variable names are
  46   deprecated, but will be used as the fall back if they are still set.
  47   Note that wgSquidPurgeUseHostHeader has not been renamed, as it is deprecated.
  48 * (T27707) File type checks for image uploads have been relaxed to allow files
  49   containing some HTML markup in metadata. As a result, the $wgAllowTitlesInSVG
  50   setting is no longer applied and is now always true. Note that MSIE 7 may
  51   still be able to misinterpret certain malformed PNG files as HTML.
  52 * Introduced $wgVerifyMimeTypeIE to allow disabling the MSIE 6/7 file type
  53   detection heuristic on upload, which is more conservative than the checks
  54   that were changed above.
  55 * $wgSkipSkin — Setting this instead of $wgSkipSkins, deprecated in 1.23, is now
  56   hard-deprecated.
  57 * $wgLocalInterwiki — Setting this instead of $wgLocalInterwikis, deprecated in
  58   1.23, is now hard-deprecated.
  59 * …
  60
  61 ==== Removed configuration ====
  62 * $wgWikiDiff2MovedParagraphDetectionCutoff — If you still want a custom change
  63   size threshold, please specify in php.ini, using the configuration variable
  64   wikidiff2.moved_paragraph_detection_cutoff.
  65 * $wgDebugPrintHttpHeaders - The default of including HTTP headers in the
  66   debug log channel is no longer configurable. The debug log itself remains
  67   configurable via $wgDebugLogFile.
  68
  69 === New user-facing features in 1.34 ===
  70 * Special:Mute has been added as a quick way for users to block unwanted emails
  71   from other users originating from Special:EmailUser.
  72
  73 === New developer features in 1.34 ===
  74 * The ImgAuthModifyHeaders hook was added to img_auth.php to allow modification
  75   of headers in private wikis.
  76 * Language::formatTimePeriod now supports the new 'avoidhours' option to output
  77   strings like "5 days ago" instead of "5 days 13 hours ago".
  78
  79 === External library changes in 1.34 ===
  80
  81 ==== New external libraries ====
  82 * …
  83
  84 ==== Changed external libraries ====
  85 * Updated Mustache from 1.0.0 to v3.0.1.
  86 * Updated OOUI from v0.31.3 to v0.33.2.
  87 * Updated composer/semver from 1.4.2 to 1.5.0.
  88 * Updated composer/spdx-licenses from 1.4.0 to 1.5.1 (dev-only).
  89 * Updated mediawiki/codesniffer from 25.0.0 to 26.0.0 (dev-only).
  90 * Updated cssjanus/cssjanus from 1.2.1 to 1.3.0.
  91 * Updated wikimedia/at-ease from 1.2.0 to 2.0.0.
  92 * Updated wikimedia/remex-html from 2.0.1 to 2.0.3.
  93 * Updated monolog/monolog from 1.22.1 to 1.24.0 (dev-only).
  94 * Updated wikimedia/object-factory from 1.0.0 to 2.1.0.
  95 * Updated wikimedia/timestamp from 2.2.0 to 3.0.0.
  96 * Updated wikimedia/xmp-reader from 0.6.2 to 0.6.3.
  97 * Updated mediawiki/mediawiki-phan-config from 0.6.0 to 0.6.1 (dev-only).
  98 * …
  99
 100 ==== Removed external libraries ====
 101 * The jquery.async module, deprecated in 1.33, was removed.
 102 * …
 103
 104 === Bug fixes in 1.34 ===
 105 * (T222529) If a log entry or page revision is recorded in the database with an
 106   empty username, attempting to display it will log an error and return a "no
 107   username available" to the user instead of silently displaying nothing or
 108   invalid links.
 109
 110 === Action API changes in 1.34 ===
 111 * The 'recenteditcount' response property from action=query list=allusers,
 112   deprecated in 1.25, has been removed.
 113
 114 === Action API internal changes in 1.34 ===
 115 * …
 116
 117 === Languages updated in 1.34 ===
 118 MediaWiki supports over 350 languages. Many localisations are updated regularly.
 119 Below only new and removed languages are listed, as well as changes to languages
 120 because of Phabricator reports.
 121
 122 * (T152908) Added language support for N'Ko (nqo).
 123
 124 === Breaking changes in 1.34 ===
 125 * The global functions wfSuppressWarnings and wfRestoreWarnings, deprecated in
 126   1.26, have been removed. Use Wikimedia\AtEase\AtEase::suppressWarnings() and
 127   Wikimedia\AtEase\AtEase::restoreWarnings() directly.
 128 * Preferences class, deprecated in 1.31, has been removed.
 129 * The following parts of code, deprecated in 1.32, were removed in favor of
 130   built-in PHP functions:
 131   * CryptRand class
 132   * CryptRand service
 133   * Functions of the MWCryptRand class: singleton(), wasStrong() and generate().
 134 * Language::setCode, deprecated in 1.32, was removed. Use Language::factory to
 135   create a new Language object with a different language code.
 136 * MWNamespace::clearCaches() has been removed.  So has the $rebuild parameter
 137   to MWNamespace::getCanonicalNamespaces(), which was deprecated since 1.31.
 138   Instead, reset services, such as by calling $this->overrideMwServices() (if
 139   your test extends MediaWikiTestCase). Services will generally not pick up
 140   configuration changes from after they were created, so you must reset
 141   services after any configuration change. Even if your code works now, it is
 142   likely to break in future versions as more code is moved to services.
 143 * The ill-defined "DatabaseOraclePostInit" hook has been removed.
 144 * PreferencesFormLegacy and PreferencesForm classes, deprecated in 1.32, have
 145   been removed.
 146 * ObjectFactory class, deprecated in 1.31, has been removed.
 147 * HWLDFWordAccumudlator class, deprecated in 1.28, has been removed.
 148 * XMPInfo, XMPReader and XMPValidate, deprecated in 1.32, have been removed.
 149 * The RedirectSpecialPage::execute method could sometimes return a Title object.
 150   This behavior was removed, and the method now matches the parent signature
 151   (SpecialPage::execute) which is to return HTML string or void.
 152   To obtain the destination title, use RedirectSpecialPage::getRedirect.
 153 * The 'recenteditcount' response property from action API action=query
 154   list=allusers, deprecated in 1.25, has been removed.
 155 * SearchEngine::userNamespaces(), SearchEngine::namespacesAsText(),
 156   SearchEngine::create(), SearchEngine::getSearchTypes() and
 157   SearchEngine::getNearMatch(), methods deprecated in 1.27, have been removed.
 158 * FileRepo::streamFile(), deprecated in 1.26, has been removed.
 159 * User::randomPassword() method, deprecated in 1.27, have been removed.
 160 * MWNamespace::canTalk(), deprecated in 1.30, have been removed.
 161 * Parser class property $mUniqPrefix, deprecated in 1.26, has been removed.
 162 * wfArrayFilter() and wfArrayFilterByKey(), deprecated in 1.32, have been
 163   removed.
 164 * wfMakeUrlIndexes() function, deprecated in 1.33, have been removed.
 165 * Method signatures in WatchedItemQueryServiceExtension have changed from taking
 166   User objects to taking UserIdentity objects. Extensions implementing this
 167   interface need to be changed accordingly.
 168 * User::getGroupPage() and ::makeGroupLinkHTML(), deprecated in 1.29, have been
 169   removed. Use UserGroupMembership::getGroupPage and ::getLink instead.
 170 * User::makeGroupLinkWiki(), deprecated in 1.29, has been removed. Use
 171   UserGroupMembership::getLink() instead.
 172 * SavepointPostgres, deprecated in 1.31, has been removed.
 173 * OutputPage::enableSectionEditLinks(), OutputPage::sectionEditLinksEnabled(),
 174   ParserOptions::getEditSection(), ParserOptions::setEditSection(), and
 175   ParserOutput::getEditSectionTokens, ::getTOCEnabled, ::setEditSectionTokens,
 176   and ::setTOCEnabled, deprecated in 1.31, have been removed.
 177 * EditPage::safeUnicodeInput() and ::safeUnicodeOutput(), deprecated in 1.30,
 178   have been removed.
 179 * Four methods in OutputPage, deprecated in 1.32, have been removed. You should
 180   use OutputPage::showFatalError or throw a FatalError instead. The methods are
 181   ::showFileCopyError(), ::showFileRenameError(), ::showFileDeleteError(), and
 182   ::showFileNotFoundError().
 183 * ApiBase::truncateArray(), deprecated in 1.32, has been removed.
 184 * IcuCollation::getICUVersion(), deprecated in 1.32, has been removed. Use PHP's
 185   INTL_ICU_VERSION constant directly.
 186 * HTMLForm::setSubmitProgressive(), deprecated in 1.32, has been removed.
 187 * ResourceLoaderStartUpModules::getStartupModules() and ::getLegacyModules(),
 188   both deprecated in 1.32, have been removed.
 189 * BaseTemplate::msgHtml() and QuickTemplate::msgHtml(), deprecated in 1.32, have
 190   been removed. Use ->msg() or ->getMsg() instead.
 191 * WatchAction::getUnwatchToken(), deprecated in 1.32, has been removed. Instead,
 192   use WatchAction::getWatchToken() with action 'unwatch' directly.
 193 * Language::initEncoding(), ::recodeForEdit(), and recodeInput(), deprecated in
 194   1.28, have been removed.
 195 * PageArchive::getTextFromRow(), ::listAllPages(), and ::getLastRevisionText(),
 196   deprecated in 1.32, have been removed.
 197 * OutputPage::getModuleScripts(), ParserOutput::getModuleScripts(), deprecated
 198   in 1.33, have been removed.
 199 * User::getPasswordValidity(), deprecated in 1.33, has been removed.
 200 * ApiQueryBase::prepareUrlQuerySearchString(), deprecated in 1.33, has been
 201   removed.
 202 * ChangeTags::purgeTagUsageCache(), deprecated in 1.33, has been removed.
 203 * JobQueueGroup::pushLazyJobs(), deprecated in 1.33, has been removed.
 204 * MediaWikiTestCase::stashMwGlobals(), deprecated in 1.32, has been removed.
 205 * SearchEngine::transformSearchTerm(), deprecated in 1.32, has been removed.
 206 * The Block typehint only refers to blocks stored in the database. It should be
 207   updated to AbstractBlock in cases where any type of block could be expected.
 208 * FileRepoStatus, deprecated in 1.25, has been removed.
 209 * The LegacyHookPreAuthenticationProvider class, deprecated since its creation
 210   in 1.27, has been removed.
 211 * IP::isValidBlock(), deprecated in 1.30, has been removed.
 212 * WikiPage::prepareContentForEdit now doesn't accept an integer for $revision,
 213   was deprecated in 1.25.
 214 * The jquery.byteLength module, deprecated in 1.31, was removed.
 215   Use the mediawiki.String module instead.
 216 * mw.language.specialCharacters, deprecated in 1.33, has been removed.
 217   Use require( 'mediawiki.language.specialCharacters' ) instead.
 218 * EditPage::submit(), deprecated in 1.29, has been removed. Use $this->edit()
 219   directly.
 220 * HTMLForm::getErrors(), deprecated in 1.28, has been removed. Use
 221   getErrorsOrWarnings() instead.
 222 * SpecialPage::getTitle(), deprecated in 1.23, has been removed. Use
 223   SpecialPage::getPageTitle() instead.
 224 * jquery.ui.effect-bounce, jquery.ui.effect-explode, jquery.ui.effect-fold
 225   jquery.ui.effect-pulsate, jquery.ui.effect-slide, jquery.ui.effect-transfer,
 226   which are no longer used, have now been removed.
 227 * SpecialEmailUser::validateTarget(), ::getTarget() without a sender/user
 228   specified, deprecated in 1.30, have been removed.
 229 * BufferingStatsdDataFactory::getBuffer(), deprecated in 1.30, has been removed.
 230 * The constant DB_SLAVE, deprecated in 1.28, has been removed. Use DB_REPLICA.
 231 * The constants NS_IMAGE and NS_IMAGE_TALK, deprecated in 1.14, have been
 232   removed. Use NS_FILE and NS_FILE_TALK respectively.
 233 * Replacer, DoubleReplacer, HashtableReplacer and RegexlikeReplacer
 234   (deprecated in 1.32) have been removed. Closures should be used instead.
 235 * OutputPage::addWikiText(), ::addWikiTextWithTitle(), ::addWikiTextTitleTidy(),
 236   ::addWikiTextTidy(), ::addWikiTextTitle(), deprecated in 1.32, have been
 237   removed.
 238 * The $wgUseKeyHeader configuration option and the OutputPage::getKeyHeader()
 239   method, deprecated in 1.32, have been removed.
 240 * WebInstallerOutput::addWikiText(), deprecated in 1.32, has been removed.
 241 * Parser::fetchFile(), deprecated in 1.32, has been removed. Use the method
 242   Parser::fetchFileAndTitle() instead.
 243 * The global function wfBCP47, deprecated in 1.31, has been removed.
 244 * wfCountDown() function, deprecated in 1.31, has been removed. Use
 245   \Maintenance::countDown() method instead.
 246 * OutputPage::wrapWikiMsg() no longer accepts an options parameter. This was
 247   deprecated since 1.20.
 248 * Skin::outputPage() no longer accepts a context. This was deprecated in 1.20.
 249 * Linker::link() no longer accepts a string for the query array, as was
 250   deprecated in 1.20.
 251 * PrefixSearch::titleSearch(), deprecated in 1.23, has been removed. Use the
 252   SearchEngine::defaultPrefixSearch or ::completionSearch() methods instead.
 253 * The UserRights hook, deprecated in 1.26, has been removed. Instead, use the
 254   UserGroupsChanged hook.
 255 * Skin::getDefaultInstance(), deprecated in 1.27, has been removed. Get the
 256   instance from MediaWikiServices instead.
 257 * The UserLoadFromSession hook, deprecated in 1.27, has been removed.
 258 * The wfResetSessionID global function, deprecated in 1.27, has been removed.
 259   Use MediaWiki\Session\SessionManager instead.
 260 * The wfGetLBFactory global function, deprecated in 1.27, has been removed.
 261   Use MediaWikiServices::getInstance()->getDBLoadBalancerFactory().
 262 * The internal method OutputPage->addScriptFile() will no longer silently drop
 263   calls that use an invalid path (i.e., something other than an absolute path,
 264   protocol-relative URL, or full scheme URL), and will instead pass them to the
 265   client where they will likely 404. This usage was deprecated in 1.24.
 266 * Database::reportConnectionError, deprecated in 1.32, has been removed.
 267 * APIEditBeforeSave hook, deprecated in 1.28, has been removed. Please see
 268   EditFilterMergedContent hook for an alternative way to use this feature.
 269 * API module methods getDescription(), getParamDescription(), & getExamples(),
 270   all deprecated in 1.25 and ignored, have been removed.
 271 * The API module method getDescriptionMessage(), deprecated in 1.30, has been
 272   removed.
 273 * The JavaScript global variable wgLoadScript has been removed. Use
 274   mw.util.wikiScript( 'load' ) instead.
 275 * ResourceLoader no longer creates the 'mw.legacy' placeholder object. It has
 276   been unused since 1.16 and was deprecated in 1.22. To deprecate a property
 277   in JavaScript, use mw.log.deprecate() instead.
 278 * The 'user.groups' module, deprecated in 1.28, was removed.
 279   Use the 'user' module instead.
 280 * The ability to override User::$mRights has been removed. Use
 281   PermissionManager::addTemporaryUserRights() instead.
 282 * Previously, when iterating ResultWrapper with foreach() or a similar
 283   construct, the range of the index was 1..numRows. This has been fixed to be
 284   0..(numRows-1).
 285 * The ChangePasswordForm hook, deprecated in 1.27, has been removed. Use the
 286   AuthChangeFormFields hook or security levels instead.
 287 * WikiMap::getWikiIdFromDomain(), deprecated in 1.33, has been removed.
 288   Use WikiMap::getWikiIdFromDbDomain() instead.
 289 * The config variables $wgHtml5, $wgJsMimeType, and $wgXhtmlDefaultNamespace,
 290   which were deprecated and ignored by core since 1.22, are no longer set to any
 291   value, and SkinTemplate no longer emits a 'jsmimetype' key. Any extensions not
 292   updated since 2013 to cope with this deprecation may now break.
 293 * (T222637) Passing ResourceLoaderModule objects to ResourceLoader::register()
 294   or $wgResourceModules is no longer supported.
 295   Use the 'class' or 'factory' option of the array format instead.
 296 * The parameter $lang of the functions generateTOC and tocList in Linker and
 297   DummyLinker must be in type Language when present. Other types are
 298   deprecated since 1.33.
 299 * …
 300
 301 === Deprecations in 1.34 ===
 302 * The MWNamespace class is deprecated. Use NamespaceInfo.
 303 * ExtensionRegistry->load() is deprecated, as it breaks dependency checking.
 304   Instead, use ->queue().
 305 * User::isBlocked() is deprecated since it does not tell you if the user is
 306   blocked from editing a particular page. Use User::getBlock() or
 307   PermissionManager::isBlockedFrom() or PermissionManager::userCan() instead.
 308 * User::isLocallyBlockedProxy and User::inDnsBlacklist are deprecated and moved
 309   to the BlockManager as private helper methods.
 310 * User::isDnsBlacklisted is deprecated. Use BlockManager::isDnsBlacklisted
 311   instead.
 312 * The Config argument to ChangesListSpecialPage::checkStructuredFilterUiEnabled
 313   is deprecated. Pass only the User argument.
 314 * WatchedItem::getUser is deprecated. Use getUserIdentity.
 315 * Passing a Title as the first parameter to the getTimestampById method of
 316   RevisionStore is deprecated. Omit it, passing only the remaining parameters.
 317 * Title::getPreviousRevisionId and Title::getNextRevisionId are deprecated. Use
 318   RevisionLookup::getPreviousRevision and RevisionLookup::getNextRevision.
 319 * The Title parameter to RevisionLookup::getPreviousRevision and
 320   RevisionLookup::getNextRevision is deprecated and should be omitted.
 321 * MWHttpRequest::factory is deprecated. Use HttpRequestFactory.
 322 * The Http class is deprecated. For the request, get, and post methods, use
 323   HttpRequestFactory. For isValidURI, use MWHttpRequest::isValidURI.  For
 324   getProxy, use (string)$wgHTTPProxy. For createMultiClient, construct a
 325   MultiHttpClient directly.
 326 * Http::$httpEngine is deprecated and has no replacement. The default 'guzzle'
 327   engine will eventually be made the only engine for HTTP requests.
 328 * RepoGroup::singleton(), RepoGroup::destroySingleton(),
 329   RepoGroup::setSingleton(), wfFindFile(), and wfLocalFile() are all
 330   deprecated. Use MediaWikiServices instead.
 331 * The getSubjectPage, getTalkPage, and getOtherPage of Title are deprecated.
 332   Use NamespaceInfo's getSubjectPage, getTalkPage, and getAssociatedPage.
 333 * MWMessagePack class, no longer used, has been deprecated in 1.34.
 334 * The Block class is separated into DatabaseBlock (for blocks stored in the
 335   database), and SystemBlock (for temporary blocks created by the system).
 336   SystemBlock should be used when creating any temporary blocks. Block is
 337   a deprecated alias for DatabaseBlock.
 338 * Parser::$mConf is deprecated. It will be removed entirely in a later version.
 339   Some context can be found at T224165.
 340 * Constructing Parser directly is deprecated. Obtain one from ParserFactory.
 341 * Title::moveSubpages is deprecated. Use MovePage::moveSubpages or
 342   MovePage::moveSubpagesIfAllowed.
 343 * The MWNamespace class is deprecated. Use MediaWikiServices::getNamespaceInfo.
 344 * (T62260) Hard deprecate Language::getExtraUserToggles() method.
 345 * Language::viewPrevNext function is deprecated, use
 346   PrevNextNavigationRenderer::buildPrevNextNavigation instead
 347 * User::trackBlockWithCookie and DatabaseBlock::clearCookie are deprecated. Use
 348   BlockManager::trackBlockWithCookie and BlockManager::clearCookie instead.
 349 * DatabaseBlock::setCookie, DatabaseBlock::getCookieValue,
 350   DatabaseBlock::getIdFromCookieValue and AbstractBlock::shouldTrackWithCookie
 351   are moved to internal helper methods for BlockManager::trackBlockWithCookie.
 352 * ResourceLoaderContext::getConfig and ResourceLoaderContext::getLogger have
 353   been deprecated. Inside ResourceLoaderModule subclasses, use the local methods
 354   instead. Elsewhere, use the methods from the ResourceLoader class.
 355 * The Preprocessor_DOM implementation has been deprecated.  It will be
 356   removed in a future release.  Use the Preprocessor_Hash implementation
 357   instead.
 358 * Sanitizer::attributeWhitelist() and Sanitizer::setupAttributeWhitelist()
 359   have been deprecated; they will be made private in the future.
 360 * SearchResult::termMatches() method is deprecated. It was unreliable because
 361   only populated by few search engine implementations. Use
 362   SqlSearchResult::getTermMatches() if really needed.
 363 * SearchResult::getTextSnippet( $terms ) the $terms param is being deprecated
 364   and should no longer be passed. Search engine implemenations should be
 365   responsible for carrying relevant information needed for highlighting with
 366   their own SearchResultSet/SearchResult sub-classes.
 367 * SearchEngine::$searchTerms protected field is deprecated. Moved to
 368   SearchDatabase.
 369 * The use of the $terms param in the ShowSearchHit and ShowSearchHitTitle
 370   hooks is highly discouraged as it's only populated by SearchDatabase search
 371   engines.
 372 * Skin::escapeSearchLink() is deprecated. Use Skin::getSearchLink() or the skin
 373   template option 'searchaction' instead.
 374 * LoadBalancer::haveIndex() and LoadBalancer::isNonZeroLoad() have
 375   been deprecated.
 376 * User::getRights() and User::$mRights have been deprecated. Use
 377   PermissionManager::getUserPermissions() instead.
 378 * The LocalisationCacheRecache hook no longer allows purging of message blobs
 379   to be prevented. Modifying the $purgeBlobs parameter now has no effect.
 380
 381 === Other changes in 1.34 ===
 382 * …
 383
 384 == Compatibility ==
 385 MediaWiki 1.34 requires PHP 7.0.13 or later. Although HHVM 3.18.5 or later is
 386 supported, it is generally advised to use PHP 7.0.13 or later for long term
 387 support.
 388
 389 MySQL/MariaDB is the recommended DBMS. PostgreSQL or SQLite can also be used,
 390 but support for them is somewhat less mature. There is experimental support for
 391 Oracle and Microsoft SQL Server.
 392
 393 The supported versions are:
 394
 395 * MySQL 5.5.8 or later
 396 * PostgreSQL 9.2 or later
 397 * SQLite 3.8.0 or later
 398 * Oracle 9.0.1 or later
 399 * Microsoft SQL Server 2005 (9.00.1399)
 400
 401 == Online documentation ==
 402 Documentation for both end-users and site administrators is available on
 403 MediaWiki.org, and is covered under the GNU Free Documentation License (except
 404 for pages that explicitly state that their contents are in the public domain):
 405
 406        https://www.mediawiki.org/wiki/Special:MyLanguage/Documentation
 407
 408 == Mailing list ==
 409 A mailing list is available for MediaWiki user support and discussion:
 410
 411        https://lists.wikimedia.org/mailman/listinfo/mediawiki-l
 412
 413 A low-traffic announcements-only list is also available:
 414
 415        https://lists.wikimedia.org/mailman/listinfo/mediawiki-announce
 416
 417 It's highly recommended that you sign up for one of these lists if you're
 418 going to run a public MediaWiki, so you can be notified of security fixes.
 419
 420 == IRC help ==
 421 There's usually someone online in #mediawiki on irc.freenode.net.