File ending/extension capitalization changed when re-uploading; accidentially created new image file

[aklapper]

Forwarding from Commons.

Atamari uploaded some files as File:xy.JPG (capital file extension; example: File:Axxis Wuppertal 2014-03-26 001.JPG). After editing the images in the local folder the user wanted to re-upload the edited image files, but VicuñaUploader changed the filename to File:Axxis Wuppertal 2014-03-26 001.jpg (no capital file ending anymore) and hence a new, separate file was created. VicuñaUploader should not change the file name and especially the file extension (or there should be a setting for that).