* $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.
=== New features in 1.27 ===
* $wgDataCenterId and $wgDataCenterRoles where added, which will serve as