* DifferenceEngine::generateDiffBody() was removed (deprecated since 1.21).
* UploadBase::stashFileGetKey() and UploadBase::stashSession() were deprecated.
Use ...->stashFile()->getFileKey() instead.
+* "Public domain" was removed as a wiki license option from the installer, in
+ favour of CC-0.
+* AuthenticationRequest::$required is now changed from REQUIRED to PRIMARY_REQUIRED
+ on requests needed by primary providers even if all primaries need them.
+ Primary providers are discouraged from returning multiple REQUIRED requests.
== Compatibility ==