$wgResourceLoaderMinifierMaxLineLength, because there was little value in
making the behavior configurable. The default values (`false` for the former,
1000 for the latter) are now hard-coded.
+* $wgDebugDumpSqlLength was removed (deprecated in 1.24).
+* $wgDebugDBTransactions was removed (deprecated in 1.20).
+* $wgRemoteUploadTarget (added in 1.26) removed, replaced by $wgForeignUploadTargets
+* $wgUseXVO has been removed, as it provides functionality only used by
+ custom Wikimedia patches against Squid 2.x that probably noone uses in
+ production anymore. There is now $wgUseKeyHeader that provides similar
+ functionality but instead of the MediaWiki-specific X-Vary-Options header,
+ uses the draft Key header standard.
+* $wgScriptExtension (and support for '.php5' entry points) was removed. See the
+ deprecation notice in the release notes for version 1.25 for advice on how to
+ preserve support for '.php5' entry points via URL rewriting.
=== New features in 1.27 ===
+* $wgDataCenterId and $wgDataCenterRoles where added, which will serve as
+ basic configuration settings needed for multi-datacenter setups.
+ $wgDataCenterUpdateStickTTL was also added.
+* Added a new hook, 'UserMailerTransformContent', to transform the contents
+ of an email. This is similar to the EmailUser hook but applies to all mail
+ sent via UserMailer.
+* Added a new hook, 'UserMailerTransformMessage', to transform the contents
+ of an emai after MIME encoding.
+* Added a new hook, 'UserMailerSplitTo', to control which users have to be
+ emailed separately (ie. there is a single address in the To: field) so
+ user-specific changes to the email can be applied safely.
+* $wgCdnMaxageLagged was added, which limits the CDN cache TTL
+ when any load balancer uses a DB that is lagged beyond the 'max lag'
+ setting in the relevant section of $wgLBFactoryConf.
==== External libraries ====
=== Bug fixes in 1.27 ===
=== Action API changes in 1.27 ===
+* Added list=allrevisions.
+* generator=recentchanges now has the option to generate revids.
=== Action API internal changes in 1.27 ===
regularly. Below only new and removed languages are listed, as well as
changes to languages because of Bugzilla reports.
-
=== Other changes in 1.27 ===
-
== Compatibility ==
MediaWiki 1.27 requires PHP 5.3.3 or later. There is experimental support for