`referer_url` stopped working for Bilibili opus url

Posted under Bugs & Features

I was writing a tool for uploading images from Bilibili dynamic, then I found this bug.
Both https://www.bilibili.com/opus/* and https://t.bilibili.com/* do not work, and the source field is not automatically filled with referer url in upload page.

It may be due to the merge of pull #5868.

Updated by asgembed

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