code: func isKnownURL(url string) (bool, string) {
  	// should check on all system's known URLs
  	var mostReleventMatchCount int
  	var mostReleventMatchName string
  	for name, known := range knownURLs {
  		match := known.compiledRegex.FindStringSubmatch(url)
  		if len(match) > mostReleventMatchCount {
  			mostReleventMatchCount = len(match)
  			mostReleventMatchName = name
  		}
  	}
  	if mostReleventMatchName == "" {
  		return false, ""
  	}
  	return true, mostReleventMatchName
  }
docs: /*
  isKnownURL compares with registered URLs in our system.
  Iterates over knownURLs and finds out most relevant matching pattern.
  If found, it returns true along with "name" of the KnownURL
  */