I am uploading tons of PD ancient books to Commons, of which the upload speed is unbearably slow. I guess uploading by URLs might work more efficiently.

So I request to add my Toolforge domain hoiscript.toolforge.org to $wgCopyUploadsDomains.

Example: https://hoiscript.toolforge.org/wzlib/00054874cc961fc64208e80ab4bcfa505be71ec2.pdf