|Open||None||T60224 Add domains to $wgCopyUploadsDomains (tracking)|
|Open||None||T44473 Allow upload-by-URL from upload.wikimedia.org|
|Resolved||TTO||T130695 ACL configuration for url-downloader.wikimedia.org allowing upload.wikimedia.org|
[Since I was asked to comment] I personally can't think of any objections to this, however I think this is more a call for ops.
However, faidon in the other bug seems to have objected to copying files via http for internal requests, so if his objection still stands, this is a moot point.
Incidentally, why is the image appearing in the body of the file description page? Some weird config option must be turned on for testwiki...
For the record, though, this can't really be used for a general-purpose commons transfer tool, because it requires the user to have upload-by-url rights on commons, which is restricted to sysops and GLAM people.