creation of passwordless "system" users for logged actions.
* $wgMaxSquidPurgeTitles was removed.
* $wgAjaxWatch was removed. This is now enabled by default.
-* $wgUseInstantCommons now hotlinks Commons images by default instead of
+* $wgUseInstantCommons now hotlinks Commons images by default instead of
downloading originals and thumbnailing them locally. This allows wikis to save
on CPU and bandwidth while reducing time to first byte for pages, even without
a thumbnail handler. See $wgForeignFileRepos documentation for tweaks.
* (T27397) WebP is enabled by default as an uploadable filetype.
+* (T48998) $wgArticlePath must now be either a full url, or start with a "/".
+* $wgRateLimitLog was removed; use $wgDebugLogGroups['ratelimit'] instead.
+* Deprecated API formats dbg, txt, and yaml have been removed.
+* CLDRPluralRule* classes have been replaced with wikimedia/cldr-plural-rule-parser.
=== New features in 1.27 ===
* $wgDataCenterId and $wgDataCenterRoles where added, which will serve as
by using ApiMessage instances instead of strings for the $result value.
* $wgAPIMaxLagThreshold was added to limit bot changes when databases lag
becomes too high.
-
-==== External libraries ====
+* Skins and extensions can now use FlexBox mixins (.flex-display(@display: flex)
+ and .flex(@grow: 1, @shrink: 1, @width: auto, @order: 1)) in Less to create
+ cross-browser-compatible FlexBox rules. Users will still need to add fallback
+ float rules or the like for compatibility with IE9- separately.
+* Added MWTimestamp::getTimezoneString() which returns the localized timezone
+ string, if available. To localize this string, see the comments of
+ $wgLocaltimezone in includes/DefaultSettings.php.
+* Added CentralIdLookup, a service that allows extensions needing a concept of
+ "central" users to get that without having to know about specific central
+ authentication extensions.
+
+=== External library changes in 1.27 ===
+==== Upgraded external libraries ====
+* Updated oojs/oojs-ui from v0.12.12 to v0.13.3.
+* Updated composer/semver from v1.0.0 to v1.2.0.
+* Update liuggio/statsd-php-client to 1.0.18.
+
+==== New external libraries ====
+* Added wikimedia/base-convert v1.0.1.
+* Added wikimedia/cldr-plural-rule-parser v1.0.0.
+* Added wikimedia/relpath v1.0.3.
+* Added wikimedia/running-stat v1.1.0.
+
+==== Removed and replaced external libraries ====
=== Bug fixes in 1.27 ===
+* Special:Upload will now display correct maximum allowed file size when running
+ under HHVM (T116347).
=== Action API changes in 1.27 ===
* Added list=allrevisions.
"was-deleted" warning.
* Added difftotextpst to query=revisions which preforms a pre-save transform on
the text before diffing it.
+* Deprecated formats dbg, txt, and yaml have been removed.
+* (T47988) The protect log event details now use new-style formatting.
=== Action API internal changes in 1.27 ===
* ApiQueryORM removed.
+* The following classes have been removed:
+** ApiFormatDbg
+** ApiFormatTxt
+** ApiFormatYaml
+* ApiQueryBase::getDirectionDescription is now marked as deprecated. It should
+ have been so marked since 1.25 when ApiBase::getParamDescription was
+ deprecated, but was overlooked at the time.
=== Languages updated in 1.27 ===
MediaWiki supports over 350 languages. Many localisations are updated
regularly. Below only new and removed languages are listed, as well as
-changes to languages because of Bugzilla reports.
+changes to languages because of Phabricator reports.
* (T113688) Change default numerals from Gurmukhi to Arabic for Punjabi locale.
* LinkCache::getGoodLinks and LinkCache::getBadLinks were removed (deprecated in 1.26).
* WikiPage::doQuickEdit() was removed (deprecated since 1.21).
* Removed SiteObject and SiteArray classes (deprecated in 1.21).
+* MessageBlobStore::getInstance() was removed (deprecated since 1.25).
+* (T84937) Free external links ("autolinked" urls) will now be terminated
+ by and HTML entity encodings of  , <, and >.
+* (T36948) The default file revert message's timestamp is now in $wgLocaltimezone,
+ instead of UTC.
+* The default name of the 'suppress' group page has been changed from
+ 'Project:Oversight' to 'Project:Suppress'.
+* DatabaseBase::resultObject() is now protected (use outside Database classes
+ not necessary since 1.11).
+* Calling ResourceLoaderFileModule::readStyleFiles() without a
+ ResourceLoaderContext instance is deprecated.
+* ResourceLoader::getLessCompiler() now takes an optional parameter of
+ additional LESS variables to set for the compiler.
+* wfBaseConvert() marked as deprecated, use Wikimedia\base_convert() directly instead.
== Compatibility ==