Please set $wgAllowExternalImagesFrom to allow https://upload.wikimedia.org/wikipedia/commons/ URLs (whatever the regex is for that...!)
(i) allow Wikimedia sites to display old versions of a file without having to reupload it. This can be handy for comparison of different file versions, particularly on Commons, in image editing tutorials, etc.
(ii) allow transcluding of a specific version, to guard against later updates. This is of particular relevance for Wikinews.
I know turning on External Images or even the Whitelist would be a BIG DEAL, but this seems a small one, as it is only supposed to affect bare URLs, and there should be few if any current bare URLs pointing to upload.wikimedia. I'm assuming that cases like [http://validator.w3.org/check?uri=http://upload.wikimedia.org/wikipedia/commons/6/68/Composite_UML_class_diagram.svg This source is valid SVG 1.1!] will NOT be affected (that would be bad).
If it's possible, maybe some attempt can be made to check what if any existing uses would be affected.