Update cdn_ranges.txt for MaxCDN
Update cdn_ranges.txt for MaxCDN

Reference:
- https://support.maxcdn.com/hc/en-us/articles/360036932271-IP-Blocks
- https://support.maxcdn.com/hc/en-us/article_attachments/360051920551/maxcdn_ips.txt

stamparm/maltrail,stamparm/maltrail,stamparm/maltrail,stamparm/maltrail