* $wgDebugPrintHttpHeaders - The default of including HTTP headers in the
debug log channel is no longer configurable. The debug log itself remains
configurable via $wgDebugLogFile.
+* $wgMsgCacheExpiry - The MessageCache uses 24 hours as the expiry for values
+ stored in WANObjectCache. This is no longer configurable.
* $wgPasswordSalt – This setting, used for migrating exceptionally old, insecure
password setups and deprecated since 1.24, is now removed.
* $wgDBOracleDRCP - If you must use persistent connections, set DBO_PERSISTENT