* (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.
=== New features in 1.27 ===
* $wgDataCenterId and $wgDataCenterRoles where added, which will serve as
"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.
=== Action API internal changes in 1.27 ===
* ApiQueryORM removed.
+* The following classes have been removed:
+** ApiFormatDbg
+** ApiFormatTxt
+** ApiFormatYaml
=== Languages updated in 1.27 ===