should be updated if LBFactory_Simple or LBFactory_Multi is configured.
* $wgPasswordSenderName has been deprecated. To set a custom mailer name,
the system message 'emailsender' should be modified (default: "{{SITENAME}}").
+* $wgDBAhandler was removed as the only class using it was also removed
=== New features in 1.23 ===
* ResourceLoader can utilize the Web Storage API to cache modules client-side.