Checks for Symantec issued certificates that will be distrusted in the Alexa Top 1 Million sites.
Raw data: https://scotthelme.co.uk/publishing-my-daily-crawler-data-for-wider-analysis/
Parsing code taken from: https://report-uri.com/home/tools
Inspired by: https://arkadiyt.com/2018/02/04/quantifying-untrusted-symantec-certificates/