+* Added $wgCacheDirectory, to replace $wgFileCacheDirectory,
+ $wgLocalMessageCache, and any other local caches which need a place to put
+ files.
+* $wgFileCacheDirectory is no longer set to anything by default, and so either
+ needs to be set explicitly, or $wgCacheDirectory needs to be set instead.
+* $wgLocalMessageCache has been removed. Instead, set $wgUseLocalMessageCache
+ to true
+* Removed $wgEnableSerializedMessages and $wgCheckSerialized. Similar
+ functionality is now available via $wgLocalisationCacheConf.