[BUG/FR] axel should prioritize using fast mirrors when multiple URLs are provided

[NightMachinery]

E.g.,

axel '-vvvv' '--num-connections=8' 'https://download.library.lol/main/2666000/c3ed8a24bf47acc3baaf6cbb31fc831d/Caplan%2C%20Bryan_Weinersmith%2C%20Zach%20-%20Open%20Borders_%20The%20Science%20and%20Ethics%20of%20Immigration-First%20Second%20%282019%29.epub' 'https://cloudflare-ipfs.com/ipfs/bafykbzaceblrkna3ghgkt7xnse6ptojgfmek4rmv32rvoml2rsszqnqlilaqy?filename=Caplan%2C%20Bryan_Weinersmith%2C%20Zach%20-%20Open%20Borders_%20The%20Science%20and%20Ethics%20of%20Immigration-First%20Second%20%282019%29.epub' 'https://gateway.ipfs.io/ipfs/bafykbzaceblrkna3ghgkt7xnse6ptojgfmek4rmv32rvoml2rsszqnqlilaqy?filename=Caplan%2C%20Bryan_Weinersmith%2C%20Zach%20-%20Open%20Borders_%20The%20Science%20and%20Ethics%20of%20Immigration-First%20Second%20%282019%29.epub' 'https://gateway.pinata.cloud/ipfs/bafykbzaceblrkna3ghgkt7xnse6ptojgfmek4rmv32rvoml2rsszqnqlilaqy?filename=Caplan%2C%20Bryan_Weinersmith%2C%20Zach%20-%20Open%20Borders_%20The%20Science%20and%20Ethics%20of%20Immigration-First%20Second%20%282019%29.epub'

This will download very slowly because the cloudflare-ipfs.com is down, while the https://gateway.pinata.cloud mirror is quite fast. If I remove the Cloudflare mirror manually, this downloads fine.