creation of passwordless "system" users for logged actions.
* $wgMaxSquidPurgeTitles was removed.
* $wgAjaxWatch was removed. This is now enabled by default.
-* (T27397) WebP is enabled by default as an uploadable filetype
+* $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.
=== New features in 1.27 ===
* $wgDataCenterId and $wgDataCenterRoles where added, which will serve as