* (bug 44923) action=upload works correctly if the entire file is uploaded in
the first chunk.
* Added 'continue=' parameter to streamline client iteration over complex query results
+* (bug 44909) API parameters may now be marked as type "upload", which is now
+ used for action=upload's 'file' and 'chunk' parameters. This type will raise
+ an error during parameter validation if the parameter is given but not
+ recognized as an uploaded file.
=== API internal changes in 1.21 ===
* For debugging only, a new global $wgDebugAPI removes many API restrictions when true.