function inferScriptSupportUrl(script, home = getScriptHome(script)) {
  let u = home && home.match(re`/
    ^https:\/\/(?:
      (?:
        (greas|sleaz)yfork\.(?:org|cc)(?:\/(?!scripts)[^/]+)? |
        openuserjs\.org
      )(?=\/scripts\/) |
      github\.com
    )\/[^/]+\/[^/]+/x`);
  if (u) {
    return `${u[0]}/${u[1] ? 'feedback' : 'issues'}`;
  }
}
@param {VMScript} script
@param {string} [home]
@returns {string | undefined}