keys imported from http://www.squid-cache.org/pgp.asc
from https://sks-keyservers.net :
> This service is deprecated. This means it is no longer maintained, and new HKPS certificates will not be issued. Service reliability should not be expected.
>
> Update 2021-06-21: Due to even more GDPR takedown requests, the DNS records for the pool will no longer be provided at all.
